See attached image
The Attempt at a Solution
a) Find the total resistance between A and B by short circuiting the voltage sources:
Rt = 100Ω in parallel with the two 150Ω
Two 150Ω in series: R = 300Ω
1/Rt = 1/100 + 1/300
Rt = 75Ω
I am having difficulty finding the thevenin equivalent voltage.
b) Don't entirely understand the question so I am unable to make an attempt
Any help would be greatly appreciated.