I like Serena
So now I want to find Vcd
Vc -> 0
(I can do that, right? Set Vc as my zero point, since it makes things easier)
Vcd = I2 x 0.5 - I3 x 4 = 8.615 x 0.5 - 2.077 x 4 = -4 V
Wow! You're starting to make up your own exercises! Cool!
Well, let's see....
You followed the wire down and back up.
Can you also follow the wire up and then back down?
(As for setting Vc to zero. I guess that's fine, although I wouldn't write it down.)