A resistor (R = 900 ?), a capacitor (C = 0.25 µF), and an inductor (L = 2.0 H) are connected in series across a 240 Hz AC source for which ?Vmax = 110 V. Calculate the following. (a) the impedance of the circuit (b) the maximum current delivered by the source (c) the phase angle between the current and voltage (d) Is the current leading or lagging behind the voltage?