Plz help l need friends I am realy good at making friends with girls

Proofread the following sentence and correct the spelling and grammar errors. there are two errors. go through reception and turned right at the l entrance.

Aclassmate is sending hurtful messages such as "you're stupid" and "you're ugly." this behavior can be described as denigration harassment cyberstalking exclusion

Which function is positive for the entire interval (-3, -2]?