Consider a ct lti system with frequency response h(j! ) = sin 4! ! (a) if the input to this system is a periodic signal x(t) = 8< : 1 0 t < 4 4 t < 8 (4) with period t = 8, determine the corresponding system output. (b) when the impulse train x(n) = p1 k= (n 4k) is the input to an lti system with frequency response h( the output of the system is found to be y(n) = cos( 5 2 n + 4 ). determine the value of h(ejk 2 ) for k = 0; 1; 2; 3.