I need to replace my rear brakes but I don't know what type of brakes I have, are they rotor or pads or what, I believe the wheel cylinder needs to be replaced because that one rear brakes leaks brake fluid, so I need to know how to bleed the brakes and what I need to do that. I have a Mechanic friend coming over to help but I wanted to have the parts and stuff already ready when he got here to save time since he's doing it as a favor please assist me.