4. Circuit 2: Superposition: Perform superposition by hand of the circuit below and obtain the voltage Vo. Note that a portion of current V, comes from each source: Vo =

Vo|20V + Vo|5A + Vo|12V = V'0 + V"0 + V"'0. Resistances are in ohms. Find V'x, V"x, and V"'x below. Redraw the circuit with one source on each time:

Fig: 1

Fig: 2

Fig: 3