Due to the nature of this problem, do not use rounded intermediate values in your calculations

Find the currents flowing in the circuit in the figure below. (Assume the resistances are
R1 = 20 Ω,

R2 = 6 Ω,

R3 = 15 Ω,

R4 = 10 Ω,

r1 = 0.5 Ω,

r2 = 0.25 Ω,

r3 = 0.25 Ω,
and
r4 = 0.5 Ω.)

I1 = A
I2 = A
I3 = A