diff --git a/practice.js b/practice.js
index a9e0f69..31ce541 100644
--- a/practice.js
+++ b/practice.js
@@ -29,6 +29,10 @@
 
 // Code Here
 
+function first(array, callback) {
+  callback(array[0])
+  }
+
 // Do not edit the code below.
 var names = ['Aodhan', 'Greg', 'Jake', 'Oscar', 'Aodhan', 'Tanner', 'Greg'];
 
@@ -47,8 +51,10 @@ first(names, function(firstName){
   Then invoke the callback, passing in the last element in the array as the argument.
 */
 
-//Code Here
-
+function last(array, callback) {
+  callback(array[array.length - 1])
+  }
+ 
 // Do not edit the code below.
 last(names, function(lastName){
   console.log('The last name in names is ' + lastName);
@@ -67,6 +73,10 @@ last(names, function(lastName){
 
 //Code Here
 
+function multiply (num1, num2, callback) {
+  return callback (num1 * num2);
+}
+
 // Do not edit the code below.
 multiply(4, 3, function(answer){
   console.log('The answer is ' + answer); //should console.log "The answer is 12"
@@ -86,6 +96,15 @@ multiply(4, 3, function(answer){
 
 //Code Here
 
+function contains(array, names, callback) {
+  if (array.includes(names)) {
+  callback(true);
+  }
+   else {
+  callback(false);
+    }
+  }
+
 // Do not edit the code below.
 contains(names, 'Oscar', function(result){
   if(result === true){
@@ -107,6 +126,12 @@ contains(names, 'Oscar', function(result){
 
 //Code Here
 
+function uniq (array, callback) {
+  var duplicate =
+  array.filter(function(cur, ind, array){return array.indexOf(cur) == ind});
+  callback (duplicate);
+  }
+
 // Do not edit the code below.
 uniq(names, function(uniqArr){
   console.log('The new names array with all the duplicate items removed is ', uniqArr);
@@ -124,6 +149,12 @@ uniq(names, function(uniqArr){
 
 //Code Here
 
+function each (array, callback) {
+		for (let i = 0; i < array.length; i++) {
+		callback(array[i], i);
+	}
+}
+
 // Do not edit the code below.
 each(names, function(item, indice){
   console.log('The item in the ' + indice + ' position is ' + item)
@@ -141,6 +172,14 @@ 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..2a76775 100644
--- a/user.json
+++ b/user.json
@@ -1,4 +1,4 @@
 {
-  "name": "",
-  "email": ""
-}
+  "name": "Robby Ann Eslava",
+  "email": "robbyann.eslava@boom.camp"
+}
\ No newline at end of file