The resistance of a galvanometer coil is 25.0 , and the current required for full-scale deflection is

Question:

The resistance of a galvanometer coil is 25.0 Ω, and the current required for full-scale deflection is 500 µA.
(a) Show in a diagram how to convert the galvanometer to an ammeter reading 20.0 mA full scale, and compute the shunt resistance.
(b) Show how to convert the galvanometer to a voltmeter reading 500 mV full scale, and compute the series resistance.