I'm trying to get a six pack and build more muscle at my core as well as getting my forearms bigger. i'm 15 and 6ft and weigh approximately 170pounds, i have only a pull up bar that has different variations of pull ups. but what type of exercises can i do that will meet my future goals? without paying a ton for equipment.

Karen is waiting by the lockers before school for her friend richard. they had agreed to look over the history review sheet together to be ready for the test later that day. richard shows up late with uncombed hair and wrinkled clothes. karen: "you're five minutes late and you look like a wreck! " richard: (slams his locker) "you know, i don't have time for this." karen: "fine! figure out the test on your own! "