diff --git a/travail-pratique-3/evaluation.mjs b/travail-pratique-3/evaluation.mjs
index bceb403..4d5e5c5 100644
--- a/travail-pratique-3/evaluation.mjs
+++ b/travail-pratique-3/evaluation.mjs
@@ -127,31 +127,31 @@ describe("question 4",  function(){
 
 })
 
-describe("question 6",  function(){
-    async function testQuestion6(userInput, expt){
-        document.getElementById("input-1").value = userInput;
-        document.getElementById("button-5").click();
+describe("question 5",  function(){
+    async function testQuestion5(userInput, expt){
+        document.getElementById("input-4").value = userInput;
+        document.getElementById("button-4").click();
         await sleep(100);
-        assert.equal(expt, document.getElementById("result-box-1").innerText)
+        assert.equal(expt, document.getElementById("result-box-4").innerText)
     }
 
     it("should find the proper number of existing country is input by user", async function(){
-        await testQuestion6("Canada", 3);
+        await testQuestion5("Canada", 3);
     });
 
     it("should show zero when non existing country is input by user", async function(){
-        await testQuestion6("France", 0);
+        await testQuestion5("France", 0);
     });
 
 })
 
 
-describe("question 7",  function(){
+describe("question 6",  function(){
     async function testQuestion7(userInput, expt){
-        document.getElementById("input-2").value = userInput;
-        document.getElementById("button-6").click();
+        document.getElementById("input-1").value = userInput;
+        document.getElementById("button-5").click();
         await sleep(100);
-        assert.equal(expt, document.getElementById("result-box-2").innerText)
+        assert.equal(expt, document.getElementById("result-box-1").innerText)
     }
 
     it("should find the proper population of existing country is input by user", async function(){
@@ -164,6 +164,23 @@ describe("question 7",  function(){
 })
 
 
+describe("question 7",  function(){
+    async function testQuestion7(userInput, expt){
+        document.getElementById("input-2").value = userInput;
+        document.getElementById("button-6").click();
+        await sleep(100);
+        assert.equal(expt, document.getElementById("result-box-2").innerText)
+    }
+
+    it("should find the proper city of existing country is input by user", async function(){
+        await testQuestion7("Canada", "Toronto");
+    });
+
+    it("should show zero when non existing country is input by user", async function(){
+        await testQuestion7("France", "aucune ville trouvée");
+    });
+})
+
 describe("question 8",  function(){
     async function testQuestion8(userInput, expt){
         document.getElementById("input-3").value = userInput;
@@ -172,23 +189,6 @@ describe("question 8",  function(){
         assert.equal(expt, document.getElementById("result-box-3").innerText)
     }
 
-    it("should find the proper city of existing country is input by user", async function(){
-        await testQuestion8("Canada", "Toronto");
-    });
-
-    it("should show zero when non existing country is input by user", async function(){
-        await testQuestion8("France", "aucune ville trouvée");
-    });
-})
-
-describe("question 9",  function(){
-    async function testQuestion8(userInput, expt){
-        document.getElementById("input-4").value = userInput;
-        document.getElementById("button-8").click();
-        await sleep(100);
-        assert.equal(expt, document.getElementById("result-box-4").innerText)
-    }
-
     it("should find the proper country of existing person entered by input by user", async function(){
         await testQuestion8("Djaffar Bensetti", "Algerie");
     });
@@ -198,5 +198,27 @@ describe("question 9",  function(){
     });
 })
 
+describe("question 9",  function(){
+    async function testQuestion9(userInput, expt){
+        document.getElementById("input-4").value = userInput;
+        document.getElementById("button-8").click();
+        await sleep(100);
+        assert.equal(expt, document.getElementById("result-box-4").innerText)
+    }
+
+    it("Canada", async function(){
+        await testQuestion9("Canada", 3);
+    });
+
+    it("Mexique", async function(){
+        await testQuestion9("Mexique", 0);
+    });
+
+    it("France", async function(){
+        await testQuestion9("France", 0);
+    });
+
+})
+
 
 mocha.run();
\ No newline at end of file
diff --git a/travail-pratique-3/index.html b/travail-pratique-3/index.html
index bbc98f2..c2107ae 100644
--- a/travail-pratique-3/index.html
+++ b/travail-pratique-3/index.html
@@ -110,20 +110,6 @@
         </div>
     </div>
 
-    <div class="columns">
-        <div class="column">
-            <button type="button" class="button is-primary" id="button-9">#button-9</button>
-        </div>
-        <div class="column">
-            <button type="button" class="button is-warning" id="button-10">#button-10</button>
-        </div>
-        <div class="column">
-            <button type="button" class="button is-primary is-light" id="button-11">#button-11</button>
-        </div>
-        <div class="column">
-            <button type="button" class="button is-warning is-light" id="button-12">#button-12</button>
-        </div>
-    </div>
 
 
 </div>
@@ -132,4 +118,4 @@
 <script src="evaluation.mjs" type="module"></script>
 
 </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/travail-pratique-3/script.js b/travail-pratique-3/script.js
index 0bc27ee..3fa1197 100644
--- a/travail-pratique-3/script.js
+++ b/travail-pratique-3/script.js
@@ -116,13 +116,13 @@ function findNumberOfCitiesInCountry(countryName) {
     return n;
 }
 
-function exo6(){
-    const userInput = document.getElementById("input-1").value;
-    document.getElementById("result-box-1").innerText = findNumberOfCitiesInCountry(userInput);
+function exo5(){
+    const userInput = document.getElementById("input-4").value;
+    document.getElementById("result-box-4").innerText = findNumberOfCitiesInCountry(userInput);
 }
 
 
-document.getElementById("button-5").onclick = exo6;
+document.getElementById("button-4").onclick = exo5;
 
 
 function findPopulationOfCitiesInCountry(countryName) {
@@ -135,13 +135,13 @@ function findPopulationOfCitiesInCountry(countryName) {
     return population;
 }
 
-function exo7(){
-    const userInput = document.getElementById("input-2").value;
-    document.getElementById("result-box-2").innerText = findPopulationOfCitiesInCountry(userInput);
+function exo6(){
+    const userInput = document.getElementById("input-1").value;
+    document.getElementById("result-box-1").innerText = findPopulationOfCitiesInCountry(userInput);
 }
 
 
-document.getElementById("button-6").onclick = exo7;
+document.getElementById("button-5").onclick = exo6;
 
 function getCitiesInCountry(country) {
     const ret = [];
@@ -177,13 +177,13 @@ function findLargestCitiesInCountry(country){
 
 }
 
-function exo8(){
-    const userInput = document.getElementById("input-3").value;
-    document.getElementById("result-box-3").innerText = findLargestCitiesInCountry(userInput);
+function exo7(){
+    const userInput = document.getElementById("input-2").value;
+    document.getElementById("result-box-2").innerText = findLargestCitiesInCountry(userInput);
 }
 
 
-document.getElementById("button-7").onclick = exo8;
+document.getElementById("button-6").onclick = exo7;
 
 
 function getPersonByName(personName) {
@@ -212,9 +212,39 @@ function findCountryOfOrigin(personName){
 }
 
 
+function exo8(){
+    const userInput = document.getElementById("input-3").value;
+    document.getElementById("result-box-3").innerText = findCountryOfOrigin(userInput);
+}
+
+
+document.getElementById("button-7").onclick = exo8;
+
+
+function getPersonsByCityName(cityName) {
+    const ret = [];
+    for(const person of persons){
+        if(person.city === cityName){
+            ret.push(person);
+        }
+    }
+    return ret;
+}
+
+function findAllPeopleInCountryByName(countryName) {
+    let ret = [];
+    for(const city of cities){
+        if(city.country === countryName){
+            ret = ret.concat(getPersonsByCityName(city.name));
+        }
+    }
+    return ret;
+
+}
+
 function exo9(){
     const userInput = document.getElementById("input-4").value;
-    document.getElementById("result-box-4").innerText = findCountryOfOrigin(userInput);
+    document.getElementById("result-box-4").innerText = findAllPeopleInCountryByName(userInput).length;
 }