Assume that R1 = 42 ,, R2 = 73 , R3 = 12 , R4 = 75 , R5 = 10 , and R6 = 20 .

A) Find the equivalent resistance of the combination shown in (Figure 1).

answer: Req=2.9

B) Find the equivalent resistance of the combination shown in (Figure 2).Express your answer in ohms to two significant figures.

Req=_________

c) Find the equivalent resistance of the combination shown in (Figure 3).Express your answer in ohms to two significant figures.

Req=_________

d) Find the equivalent resistance of the combination shown in (Figure 4).Express your answer in ohms to two significant figures.

Req=_________

figure 1:

25 0 12 0 5.0 0R. 13 Q R 11 0 14 0