.2 Use Matlab to compute the linear convolution of the following pairs: a) x(n)-n² (u(n+2)-u(n-3))+u(n-4)-u(n-7) and h(n)-2 sin (n) (u(n+2)-u(n-3)) Insert code Insert graph b) x(n)-n' (u(n+2)-u(n-3))+u(n-4)-u(n-7) and h(n)-2 sin(n-3)(u(n-3)-u(n-5)) Insert code Insert graph What can be observed from results obtained in (a) and (b)? (5)