In the AC circuit shown in the figure below, R = 70.0 Ω and the output voltage of the AC source is ΔVmaxsin(ωt). (a) If ΔvR = 0.265 Δvmax for the first time at t = 0.0080 s, what is the angular frequency of the source? rad/s (b) What is the next value of t for which ΔvR = 0.265 Δvmax? s