diff --git a/04 - Array Cardio Day 1/index-START.html b/04 - Array Cardio Day 1/index-START.html
index 03eb5f0b20..bdd0defad9 100644
--- a/04 - Array Cardio Day 1/index-START.html	
+++ b/04 - Array Cardio Day 1/index-START.html	
@@ -63,14 +63,34 @@
 
     // 6. create a list of Boulevards in Paris that contain 'de' anywhere in the name
     // https://en.wikipedia.org/wiki/Category:Boulevards_in_Paris
+    /*const category = document.querySelector('.mw-category');
+    const links = [...category.querySelectorAll('a')];
+    const de = links
+              .map(link => link.textContent)
+              .filter(streetName => streetName.includes('de'));*/
 
 
     // 7. sort Exercise
     // Sort the people alphabetically by last name
+    const alphabeticalSort = people.sort((a, b) => {
+      const [aLast, aFirst] = a.split(', ');
+      const [bLast, bFirst] = b.split(', ');
+      return aLast > bLast ? 1 : -1;
+    });
+    console.log(alphabeticalSort);
 
     // 8. Reduce Exercise
     // Sum up the instances of each of these
     const data = ['car', 'car', 'truck', 'truck', 'bike', 'walk', 'car', 'van', 'bike', 'walk', 'car', 'van', 'car', 'truck' ];
+    const sum = data.reduce(function(obj, item) {
+      if(!obj[item]){
+        obj[item] = 0;
+      }
+      obj[item]++;
+      return obj;
+    }, {});
+
+    console.log(sum);
 
   </script>
 </body>