A resistor R1 consumes electrical power p1 when connected to

A resistor R1 consumes electrical power p1 when connected to an emf E. When resistor R2 is connected to the same emf, it consumes electrical power P2. In terms of p1 and P2• what is the total electrical power consumed when they are both connected to this emf source
(a) In parallel and
(b) In series?