3. Find the cube root of the given complex number: y = (4-j3) i.e., find (4-3). You may leave your answer in polar form. (20) 4. Consider the two sinusoidal signals X1(t) = 3cos(wt + /2) and X2(t)=(3+j2)cos(wt). Let P(t) be the sum of the two signals i.e., P(t)=x1(t)+x2(t). Use only the method of phasor representation to: (a) Find the total complex phasor representation (XT) of P(t). (b) Find P(t). (22)