a. Four resistors (R1 = 150
Ω, R2 = 250
Ω, R3 = 350
Ω, R4 = 450 Ω) are connected in
series with a 12-V battery. What is the current that flows through
the 250-Ω resistor?
b. What is the equivalent resistance of the circuit?
c. What is the total current drawn in this
circuit?