diff --git a/practice.js b/practice.js
index a9e0f69..a9698e7 100644
--- a/practice.js
+++ b/practice.js
@@ -28,6 +28,9 @@
 */
 
 // Code Here
+function first(names, callback){
+  return callback(names[0]);
+}
 
 // Do not edit the code below.
 var names = ['Aodhan', 'Greg', 'Jake', 'Oscar', 'Aodhan', 'Tanner', 'Greg'];
@@ -48,6 +51,10 @@ first(names, function(firstName){
 */
 
 //Code Here
+function last(names, callback){
+  return callback(names[names.length-1]);
+}
+
 
 // Do not edit the code below.
 last(names, function(lastName){
@@ -66,6 +73,10 @@ last(names, function(lastName){
 */
 
 //Code Here
+function multiply(n, c, callback){
+  return callback(n*c);
+}
+
 
 // Do not edit the code below.
 multiply(4, 3, function(answer){
@@ -85,6 +96,13 @@ multiply(4, 3, function(answer){
 */
 
 //Code Here
+function contains(arr, name, callback){
+  if(arr.includes(name)){
+    return callback(true);
+  } else {
+   return callback(false);
+  }
+ }
 
 // Do not edit the code below.
 contains(names, 'Oscar', function(result){
@@ -106,6 +124,11 @@ contains(names, 'Oscar', function(result){
 */
 
 //Code Here
+function uniq(arr, callback){
+  const uniqueAges = arr.filter((x, i, a) => a.indexOf(x) == i)
+  callback(uniqueAges);
+}
+
 
 // Do not edit the code below.
 uniq(names, function(uniqArr){
@@ -123,6 +146,12 @@ uniq(names, function(uniqArr){
 */
 
 //Code Here
+function each(names, callback){
+  for (let c=0; c < names.length; c++){
+  callback(names[c], c);
+  }
+}
+
 
 // Do not edit the code below.
 each(names, function(item, indice){
@@ -140,6 +169,13 @@ each(names, function(item, indice){
 */
 
 // Code here
+function getUserById(users, id, callback){
+  for (let c=0; c<users.length; c++){
+  if (users[c].id === id){
+    return callback(users[c]);
+  }
+}
+}
 
 // Do not edit the code below.
 var users = [
diff --git a/user.json b/user.json
index 4ac80a0..802040f 100644
--- a/user.json
+++ b/user.json
@@ -1,4 +1,4 @@
 {
-  "name": "",
-  "email": ""
+  "name": "Diana Lyn C. Geromo",
+  "email": "diana.geromo@boom.camp"
 }