Question: Group Delay of the FIR Filter
a. Plot the impulse response of the FIR filter. Then generate and plot its frequency response magnitude and group delay. How could you have anticipated from the impulse response that the group delay would be constant?
b. For the signals xl and x2, what output would you expect to get from processing each sequence with the FIR system. Verify your prediction by explicitly computing the outputs due to xl and x2 using conv or filter.