Let R > 0. Evaluate ff em+y2dmdy, D (a) where D is the reginn given by m2 + y2 5 R2, (b) where D is the reginn given by m2 + y2 E R2 and .1: + y 2 0, 3 (e) where D is the reginn given by m2 + y2 E R2 and :r y 5 0