diff --git a/src/core.js b/src/core.js
index 6380dd5..ee61c0c 100644
--- a/src/core.js
+++ b/src/core.js
@@ -2,32 +2,46 @@
 const person = { age: 32, size: 'Small' }
 
 // 1. Give the person object a name property with the value Matt
+person.name = 'Matt'
 
 // 2. Remove the size property from the person
+delete person.size
 
 // 3. Increase the person's age by 11
+person.age += 11
 
 // 4. Add an instruments property to the person, initialised as an empty array
+person.instruments = []
 
 // 5. Add the following instruments to the persons instruments array: Guitar, Piano, Vocals
+person.instruments.push(...['Guitar', 'Piano', 'Vocals'])
 
 // 6. Using an index on the instruments array, set the mainInstrument variable below
 // to the third instrument in the array
-const mainInstrument = undefined
+const mainInstrument = person.instruments[2]
 
 // 7. Add a profession property to the person, which is an object
+person.profession = {}
 
 // 8. Add a name property to the profession object with the value Musician
+person.profession.name = 'Musician'
 
 // 9. Add a friends property to the person, which is an empty array
+person.friends = []
 
 // 10. Add two objects to the persons friends array with the following properties:
 // Friend one: name - Chris, age - 46
 // Friend two: name - Dom, age - 43
+person.friends.push(
+  ...[
+    { name: 'Chris', age: 46 },
+    { name: 'Dom', age: 43 }
+  ]
+)
 
 // 11. Using an index on the persons friends array, set the bestFriend variable below
 // to the name of the first friend in the array
-const bestFriend = undefined
+const bestFriend = person.friends[0].name
 
 // Don't change the code below this line
 module.exports = {