diff --git a/practice.js b/practice.js
index a9e0f69..73c50fa 100644
--- a/practice.js
+++ b/practice.js
@@ -28,6 +28,9 @@
 */
 
 // Code Here
+function first(array, callback) {
+  callback(array[0])
+  }
 
 // Do not edit the code below.
 var names = ['Aodhan', 'Greg', 'Jake', 'Oscar', 'Aodhan', 'Tanner', 'Greg'];
@@ -48,6 +51,9 @@ first(names, function(firstName){
 */
 
 //Code Here
+function last(array, callback) {
+  callback(array.slice(-1).pop());
+}
 
 // Do not edit the code below.
 last(names, function(lastName){
@@ -66,6 +72,9 @@ last(names, function(lastName){
 */
 
 //Code Here
+function multiply(num1, num2, callback) {
+  callback(num1 * num2);
+}
 
 // Do not edit the code below.
 multiply(4, 3, function(answer){
@@ -85,6 +94,14 @@ multiply(4, 3, function(answer){
 */
 
 //Code Here
+function contains(array, name, callback) {
+  if (array.includes(name)) {
+    callback(true);
+  }
+  else {
+    callback(false);
+  }
+}
 
 // Do not edit the code below.
 contains(names, 'Oscar', function(result){
@@ -106,6 +123,10 @@ contains(names, 'Oscar', function(result){
 */
 
 //Code Here
+function uniq (array, callback) {
+  var result = [...new Set(array)];
+  callback(result);
+}
 
 // Do not edit the code below.
 uniq(names, function(uniqArr){
@@ -123,6 +144,11 @@ uniq(names, function(uniqArr){
 */
 
 //Code Here
+function each (names, callback) {
+  for (let i=0; i<names.length; i++) {
+    callback(names[i], i)
+  }
+}
 
 // Do not edit the code below.
 each(names, function(item, indice){
@@ -140,6 +166,13 @@ each(names, function(item, indice){
 */
 
 // Code here
+function getUserById (array, id, callback) {
+  for (var i = 0; i < array.length; i++) {
+      if (id == array[i]) {
+      }
+      return callback(array[i]);
+  }
+}
 
 // Do not edit the code below.
 var users = [
diff --git a/user.json b/user.json
index 4ac80a0..e7b999d 100644
--- a/user.json
+++ b/user.json
@@ -1,4 +1,4 @@
 {
-  "name": "",
-  "email": ""
+  "name": "Trizha Kate N. Longaza",
+  "email": "trizha.longaza@boom.camp"
 }