I have an exam soon and Im unsure if Im working out superposition problems correctly. I have to find the current through each resistor, the power through the 6 ohm resistor and the energy after 10 seconds dissipated by the 43v supply. Can someone confirm:

I1 = 4.539

I2 = 1.486

I3 = 3.053

I4 = 0.967

I5 = 2.146

P4 = 4.15

Energy = 1990.25j