Super Position

I know i have to short one source and solve, then short the other and solve, but then Im lost.

I must find Vr2 to answer question.

#2

Classic Series-Parallel

Just a large question for me, i got as far as finding Resistance total, which i think is 312.62Ω, but i could be wrong.

The question asks for VRx R1 - R6, IRx R1 - R6, Current Total, Power Total, and Resistance Total.

(r1=15Ω,r2=100,r3=100,r4=1000,r5=150,r6=100)

Any help is greatly appreciated, thanks in advance.