Problem 4: Given voltages v (t) and v (t) for the following cases, what is v (t) + V (t) and v (t)- v(t). Solve each case by: 1) converting the voltages to phasor form; 2) adding or subtracting; and 3) converting the solution to the time-domain. a. v (t) = 15 cos (2760t - 35) and v(t) = 24 cos(2760t +53) b. v (t)= 15 cos (2760t - 35) and v (t) = 24 sin(2760t + 53)