(a) Find the current in each resistor of Figure P18.18 by using the rules for resistors in series and parallel.
(b) Write three independent equations for the three currents using Kirchhoff's laws: one with the node rule; a second using the loop rule through the battery, the resistor, and the resistor; and a third using the loop rule through the and resistors. Solve to check the answers found in part (a).
