x(t) System 1 t Overall System z(t) System 2 Consider the above continuous-time system characterized by the following input-output relationships as given below: and t y(t) = z(t)dt t-4 (i) Is this overall system linear time-invariant? Substantiate your answer (ii) Determine and plot the impulse response, h(t), of the overall system. y(t) z(t)= x(r)dr x(T)dt 1-2