pls do 4 and 5

1. H is a discrete-time LTI system with impulse response h[n] =-n] + 2n-1]-5[n-2] The system input is given by Find the output signal yn H is a discrete-time LTI system with impulse response hin] = [n]-201n-1] + 301n-2] Find the output signal yn] in terms of the input signal n] 3. H is a discrete-time LTI system with impulse response un. The system input is given by Find the output signal yn 4. H is a discrete-time LTI system with impulse response 1, 2