diff --git a/.vscode/settings.json b/.vscode/settings.json
new file mode 100644
index 0000000..28a51d5
--- /dev/null
+++ b/.vscode/settings.json
@@ -0,0 +1,3 @@
+{
+    "compile-hero.disable-compile-files-on-did-save-code": false
+}
\ No newline at end of file
diff --git a/session-01/dist/validators.dev.js b/session-01/dist/validators.dev.js
new file mode 100644
index 0000000..9c8fe6e
--- /dev/null
+++ b/session-01/dist/validators.dev.js
@@ -0,0 +1,32 @@
+"use strict";
+
+/*
+  Write a function that returns true or false if the given username
+  is valid according to the following rules:
+  - username must be between (and including) 3-10 characters in length
+  - username must begin with a letter
+  - username may contain numbers and letters
+  - username cannot contain special characters
+*/
+function validUsername(username) {
+  var usernamePattern = /^[a-zA-Z][a-zA-Z0-9]{2,9}$/;
+  return usernamePattern.test(username);
+}
+/*
+  Write a function that returns true or false if the given password
+  is valid according to the following rules:
+  - password must be between (and including) 10-64 characters in length
+  - password must contain at least 1 letter, 1 number, and 1 special character
+*/
+
+
+function validPassword(password) {
+  var passwordPattern = /^(?=.*[a-zA-Z])(?=.*[0-9])(?=.*[!@#$%^&*(),.?":{}|<>])[a-zA-Z0-9!@#$%^&*(),.?":{}|<>]{10,64}$/;
+  return passwordPattern.test(password);
+  return;
+}
+
+module.exports = {
+  validUsername: validUsername,
+  validPassword: validPassword
+};
\ No newline at end of file
diff --git a/session-01/validators.js b/session-01/validators.js
index 56ea66d..9ce0f43 100644
--- a/session-01/validators.js
+++ b/session-01/validators.js
@@ -7,7 +7,9 @@
   - username cannot contain special characters
 */
 function validUsername(username) {
-  return;
+  const usernamePattern = /^[a-zA-Z][a-zA-Z0-9]{2,9}$/;
+  return usernamePattern.test(username);
+  
 }
 
 /*
@@ -17,6 +19,8 @@ function validUsername(username) {
   - password must contain at least 1 letter, 1 number, and 1 special character
 */
 function validPassword(password) {
+  const passwordPattern = /^(?=.*[a-zA-Z])(?=.*[0-9])(?=.*[!@#$%^&*(),.?":{}|<>])[a-zA-Z0-9!@#$%^&*(),.?":{}|<>]{10,64}$/;
+  return passwordPattern.test(password);
   return;
 }
 
diff --git a/session-02/dist/exercise.dev.js b/session-02/dist/exercise.dev.js
new file mode 100644
index 0000000..cbb71fb
--- /dev/null
+++ b/session-02/dist/exercise.dev.js
@@ -0,0 +1,34 @@
+"use strict";
+
+/*
+  Transform the input array of strings into uppercase strings
+  For example, for the input ["cat", "hat"], return ["CAT", "HAT"]
+*/
+function transformArrayToUpper(listOfStrings) {
+  return listOfStrings.map(function (string) {
+    return string.toUpperCase();
+  });
+}
+/*
+  Write a function that returns the sum of all student ages.
+  The function will be passed an array of objects and the result
+  will be the sum of all ages.
+  - Note, not all objects will contain an age. Omit these objects.
+  For example, for the input:
+    [{ name: 'Sandra', age: 31 }, {}, { name: 'Didi', age: 20}]
+    the function should return 51
+*/
+
+
+function sumOfAllAges(listOfStudentObjects) {
+  return listOfStudentObjects.filter(function (student) {
+    return student.age && typeof student.age === 'number';
+  }).reduce(function (accumulator, student) {
+    return accumulator + student.age;
+  }, 0);
+}
+
+module.exports = {
+  transformArrayToUpper: transformArrayToUpper,
+  sumOfAllAges: sumOfAllAges
+};
\ No newline at end of file
diff --git a/session-02/exercise.js b/session-02/exercise.js
index 6ade818..4bc8fec 100644
--- a/session-02/exercise.js
+++ b/session-02/exercise.js
@@ -3,9 +3,9 @@
   For example, for the input ["cat", "hat"], return ["CAT", "HAT"]
 */
 function transformArrayToUpper(listOfStrings) {
-  return;
+ 
+  return listOfStrings.map(string => string.toUpperCase());
 }
-
 /*
   Write a function that returns the sum of all student ages.
   The function will be passed an array of objects and the result
@@ -16,7 +16,9 @@ function transformArrayToUpper(listOfStrings) {
     the function should return 51
 */
 function sumOfAllAges(listOfStudentObjects) {
-  return;
+ return listOfStudentObjects
+    .filter(student => student.age && typeof student.age === 'number')
+    .reduce((accumulator, student) => accumulator + student.age, 0);
 }
 
 module.exports = { transformArrayToUpper, sumOfAllAges };