Two scales on a voltmeter measure voltages up to 21.0 and 30.7 V, respectively. The resistance connected in series with the galvanometer is 1540Ω for the 21.0-V scale and 3050Ω for the 30.7-V scale. Determine
(a) the coil resistance and
(b) the full-scale current of the galvanometer that is used in the voltmeter.