A heat engine using 1.0 of a monatomic gas follows the cycle shown in the figure. 3750 of heat…

P(KPa)
^
Pmax|2 ___>____ 3
3750=>|||
|^|
300 |1|____<___|4
|____________>
Vmin Vmax = 2 Vmin

I figured out the first part 1–>2 b/c is was isochloric and so W=0 and Q = 3750 J, but I can't figure out the W/Q for the rest of the problem b/c no Pressuremax or either of the volumes is given. Please help.