Problem 2 74 - solved -Fundamentals of Electric Circuits -

The circuit in Fig. 2.134 is to control the speed of a
motor such that the motor draws currents 5 A, 3 A,
and 1 A when the switch is at high, medium, and low
positions, respectively. The motor can be modeled as
a load resistance of 20 mohm Determine the series
dropping resistances R1, R2, and R3.