Let X(t) be a continuous-time signal. *(t) = et a) Create a discrete-time sequence 31 [n] by sampling 2(t) every T = 2. Is 21 [n] periodic? If so, what is the period (N)? Find its Fourier transform X (). b) Create a discrete-time sequence 22[n] by sampling (t) every T = 4. Is x2[n] periodic? If so, what is the period (N2)? Find its Fourier transform X2(ej?).