2. For the following pairs of input signal, x (t), and system impulse response, h (t), determine the output signal, y (t): (a) x(t)=8(t-1)+8(1+1), h(t)=eu(t) (b) x(t)=u(t), h(t)=u(t)-u(t-1) 3. Two first order systems are cascaded as shown in Figure (1): hi(t) = e -u(t), and h(t) = e-0.t.u(t) x(1) h, (t) h(t) Determine the output when a unit step signal is input. +y(t)