$2.)(10$ points$)$ A circuit composed of only two elements is driven with an EMF of $=4\mathrm{.}0cos(20t)V,$ and carries a current of $I=2\mathrm{.}0cos(20t+\frac{}{4})A.$ What two elements are in the circuit, and what are their characteristics $($resistance$,$ capacitance, or inductance, as appropriate$)?$ Phasor analysis may be useful to you here.