A resistor (R = 900 ?), a capacitor (C = 0.25 µF), and an inductor (L = 3.5 H) are connected in series across a 240 Hz AC source for which ?Vmax = 145 V. Calculate the following. (a) the impedance of the circuit ? (b) the maximum current delivered by the source A (c) the phase angle between the current and voltage °