(a) Prove and explain graphically the difference between the relations x(n)(n n0) = x (n0)(n n0) and x(n) * (n n0) =

(a) Prove and explain graphically the difference between the relations x(n)δ(n – n0) = x (n0)δ(n – n0) and x(n) * δ(n – n0) = x (n – n0)
(b) Show that a discrete-time system, which is describe by a convolution summation is LTI and relaxed,
(c) What is the impulse response of the system described by y(n) = x (n – n0)?