3 unknown rap songs with lnks tot he mp3s

*google is not helping me...even if you are pretty sure of the artist it would help. i'm thinking the second one is Big Sean but I can't be sure. Help!

http://www.filedropper.com/02track2_27


http://www.filedropper.com/12track12_6


http://www.filedropper.com/unknownsong-hustle