Determine the transfer function, H r (z), of the ramp-invariant model of H a (s)=1/(s+a).Describe the step-invariant model of H a (s)=1/(s 2 +2s+5) in terms of a difference equation that computes...

Determine the transfer function, H_r
(z), of the ramp-invariant model of H_a(s)=1/(s+a).Describe the step-invariant model of H_a
(s)=1/(s²+2s+5) in terms of a difference equation that computes output samples (y_k) in terms of input samples (x_k).