The AC voltage in a resonant LC circuit (the resistance, R is considered to be zero) is given as V(t)=120 cos (80 t). Assume that L=0.1 H and C=0.001 F. The value of the magnetic energy stored in the inductor (UL) when the charge on the plates of the capacitor is one fourth of the maximum charge value that the plate can hold is: A) 15.52 J B) 6.84 J C) 3.33 J D) 2.02 J E) None of the above