diff --git a/04 - Array Cardio Day 1/index-START.html b/04 - Array Cardio Day 1/index-START.html
index 0dcfd00f40..b56e79512b 100644
--- a/04 - Array Cardio Day 1/index-START.html	
+++ b/04 - Array Cardio Day 1/index-START.html	
@@ -39,28 +39,114 @@
     // Array.prototype.filter()
     // 1. Filter the list of inventors for those who were born in the 1500's
 
+    const fifteen = inventors.filter(item => item.year >= 1500 && item.year < 1600);
+
+    console.table(fifteen);
+
+    /* longer version:
+      const fifteen = inventors.filter(function(inventor) {
+      if (inventor.year >= 1500 && inventor.year < 1600) {
+        return true; 
+      } else {
+        return false;
+      }
+    });
+    */
+
     // Array.prototype.map()
     // 2. Give us an array of the inventors first and last names
 
+    const fullNames = inventors.map(inventor => inventor.first + ' ' + inventor.last);
+
+    /* const fullNames = inventors.map(inventor => `${inventor.first} `${inventor.last}`); */
+
+    console.log(fullNames);
+
     // Array.prototype.sort()
     // 3. Sort the inventors by birthdate, oldest to youngest
 
+    const ordered = inventors.sort( (a, b) => a.year > b.year ? 1 : -1);
+
+    console.table(ordered);
+
+    /* const sorted = inventors.sort(function(a, b) {
+      if (a.year > b.year) {
+        return 1;
+      } else {
+        return -1;
+      }
+    });*/
+
     // Array.prototype.reduce()
     // 4. How many years did all the inventors live all together?
 
+    const totalYears = inventors.reduce((total, inventor) => {
+      return total + (inventor.passed - inventor.year)
+    }, 0);
+
+    console.log(totalYears);
+
     // 5. Sort the inventors by years lived
 
+    /* const sortedByYears = inventors.sort( (a, b) => {
+      (a.passed - a.year) - (b.passed - b.year)
+    }); */
+
+    const sortedByYears = inventors.sort(function(a, b){
+      if ((a.passed - a.year) > (b.passed - b.year)){
+        return 1;
+      } else {
+        return -1;
+      }
+    });
+
+    console.table(sortedByYears);
+
     // 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 = Array.from(category.querySelectorAll('a'));
+    // // 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 alpha = people.sort((lastOne, nextOne) => {
+      const [aLast, aFirst] = lastOne.split(', ');
+      const [bLast, bFirst] = nextOne.split(', ');
+      return aLast > bLast ? 1 : -1;
+    });
+    console.log(alpha);
+
+
+    /* const lastNames = people.sort( (a, b) => {
+      const [aLast] = a.split(', ');
+      const [bLast] = b.split(', ');
+      return aLast.localeCompare(bLast);
+    }); */
+
+    
+
     // 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 transportation = data.reduce((obj, item) => {
+      if (!obj[item]){
+        obj[item] = 0;
+      }
+      obj[item]++;
+      return obj;
+    }, {});
+
+    console.log(transportation);
+    
+
   </script>
 </body>
 </html>
diff --git a/07 - Array Cardio Day 2/index-START.html b/07 - Array Cardio Day 2/index-START.html
index 4ca34c7536..5c32ddbc46 100644
--- a/07 - Array Cardio Day 2/index-START.html	
+++ b/07 - Array Cardio Day 2/index-START.html	
@@ -29,14 +29,47 @@
     // Array.prototype.some() // is at least one person 19 or older?
     // Array.prototype.every() // is everyone 19 or older?
 
+    // const isAdult = people.some(function(person){
+    //   if (2025 - (person.year) >= 19){
+    //     return true;
+    //   }
+    // });
+
+    const isAdult = people.some(person =>
+      ((new Date()).getFullYear()) - person.year >= 19 );
+
+      console.log({isAdult});
+
+    const areAdults = people.every(person =>
+      ((new Date()).getFullYear()) - person.year >= 19 );
+
+      console.log({areAdults});
+
+
     // Array.prototype.find()
     // Find is like filter, but instead returns just the one you are looking for
     // find the comment with the ID of 823423
 
+    const comment = comments.find(comment => comment.id === 823423);
+
+    console.log(comment);
+
     // Array.prototype.findIndex()
     // Find the comment with this ID
+
+    const index = comments.findIndex(comment => comment.id === 823423);
+
+    console.log(index);
+
     // delete the comment with the ID of 823423
 
+    // comments.splice(index, 1);
+
+    const newComments = [
+      comments.slice(0, index),
+      comments.slice(index + 1)
+    ];
+
   </script>
 </body>
 </html>