Problem 3 (Evaluate Convolution) Perform convolutions of the following functions. Use hand drawings to determine the intervals. You will need to show intermediate calculation steps to get full points. a) (6') x(t)=rect(t) and h(t) = rect (2t - 1/2). b) (6') x(t)=etu(t) and h(t) = e = etu(t). c) (8') x(t) = e[u(t + 3) = u(t)], h(t) = e3 [u(t 1) = u(t 2)]. -