1. Find and plot the magnitude, phase (in radians, in the range [-\pi, \pi]), and real and imaginary parts
of the following complex signals s(t) for t \in [-2, 2]. (5 points each)
(a) s(t) = 10e^{j4\pi t - 2t} (b) s(t) = e^{j\pi (t + \frac{1}{2})} + e^{-j\pi (t - \frac{1}{2})} (c) s(t) = 1 - e^{-j4\pi t} (d) s(t) = sin(\pi t) + j cos(\pi t)
