Q2. (a) The signal x(t) = 2 sinc (2t) is sampled at a frequency of 8 Hz to obtain the sampled signal x(t). i. Express x(t) in terms of x(t) ii. Derive the Fourier transform, X, (f), of the sampled signal x(t). (b) The sampling frequency is changed to 0.5 Hz. Determine the Fourier transform, X, (f), of this new sampled signal.