Can you please help me with this Matlab Assignment?

3.) A causal LTID system is described by the second-order discrete-time system as, Use the method descnibed in ection M3 2 to compue the impule response through filtering for n (0:25). b. Use Matlab function impz0 to compute impulse response for the system, h[n], for n (0:25). Plot h[n]. Did you get the same result as that in (a)? Plot h[n], and the difference between h[n]'s in part (a) and part (b) Suppose the input for the system is c. x[n] = u[n]-u[n-15] with initial condition yH-y[-2] = 2, compute the zero-input response, yz, the zero-state response, as and the total response, yIn]