A hacker is someone who

accesses someone’s computer without permission. (correct answer)
creates a scam to steal personal information.
posts personal information on a public website.
sends inappropriate and upsetting content to others.

1 & 2

Explanation:

to change your profile

1. hit your picture thing on the top right corner (that's where mine is).

2. there should be options under it, so hit "edit profile".

3. it'll bring you to a page that gives you these options: "preferences", "send info to email", "password",   "your email", and "profile picture". click "profile picture".

4. hit choose file.

5. click your picture you'd like and hit change!

i hope this and makes sense! good luck!

there mad at that place