3.11. (a) Consider the two-LTI system cascaded in Figure P3.11. The impulse responses of the two systems are identical, with h(t)-h₂(1) 2e 'u(t). Find the impulse response of the total system.

(b) Repeat Part (a) for the case that h(t)=h₂(t) = 28(1) (c) Repeat Part (a) for the case that h(t)-h₂(t)-28(-3) (d) Repeat Part (a) for the case that h(t) = h₂(t) = u(t-1)-(-5) x(0) ► 10,6) 20 y(0) Figure P3.11