Please I need a help with this question!!!

Part 3 [Transfer Function] Suppose your ID is abcdef Given a discrete-time LTI system whose difference equation is given by: y[n]+2y[n1]+3y[n2]=2x[n]x[n1] a) Use MATLAB's tf function to compute the transfer function H(z) b) Derive theoretically the impulse response h(n) of the above c) Find the impulse response h(n) of the system using MATLAB's iztrans. In other words, use iztrans to find the inverse z-transform of H(z). Note: type help latrans in MATLAB to find how to use the symbolic command iztrans. d) Compare the results obtained in b) and c). If they are not equal, what may be the reason? e) Using the dstep function, plot the step response of the above system for n[0a+b+c+d] assuming the sampling period is Ts=0.01 secomds