An alternating source with a variable frequency, a capacitor with capacitance C, and a resistor with resistance R are connected in series. The figure gives the impedance Z of the circuit versus the driving angular frequency ωd, the curve reaches an asymptote of 660 Ω, and the horizontal scale is set by ωds = 346 rad/s. The figure also gives the reactance Xc for the capacitor versus ωd. What are (a) R and (b) C? Assume Zs = 528 Ω. (a) Number Units (b) Number Units