A finite-energy signal with time-domain expression x(t) is sent into a LTI channel or device with impulse response h(t), yielding an output signal y(t): x(t) = ) = 201 () h(t) = 18 (t 2) Derive the following: a) the autocorrelation function Rx(T) of the input signal x(t) b) the energy spectral density function of x (t) c) the cross-correlation function Rxy(t) of input signals x(t) and output y(t)