You have a wire of length L = 0.5 m for making a square coil of a dc motor. The current in the coil is I = 1.5 A, and the magnetic field of the motor has a magnitude of B = 0.18 T. Find the maximum torque exerted on the coil when the wire is used to make (a) a single-turn square coil and (b) a two-turn square coil.