Calculate the total resistance in each situation as follows:

 Given that

R1 = 4Ω

R2 = 4 Ω

R3 = 3 Ω

From the given circuit diagram,

1/R = 1/R1 + 1/R2

1/R = ¼ + ¼

R = 2 Ω

Total resistance = R + R3

= 2 + 3

= 5 Ω