1. Determine the Nyquist sampling rate, in samples/sec, for each of the following signals. (a) y(t)=5+ cos(20πt) + sin(10πt) (b) z(t) = (sin(xt)) 4 Hint: You don't have to calculate the convolution to determine the bandwidth. (c) x(t) sin(10πt), where x(t) is a signal with Nyquist rate fs = 50 samples/sec. (d) x(t) = sin(10πt) sin(30πt) 10πt * 30πt