FIR filter is described by the difference equation, = 12 + 12 [ 1 ] a) Compute and sketch its magnitude and phase response b) Find the response of the above system to the following input signals i) =2++(+)+(5+) 166463 ii) 2 =1+13cos 6+4 +12sin 6+4 c) Draw the magnitude and phase spectrums of the above inputs signals and their corresponding output signals, and, explain the filtering impact of the system by comparing the spectrums of input and output signals.