3. (a) A linear-phase FIR filter is to approximate an ideal low-pass filter with frequency response defined as follows: H(0) = {e-ine, The filter is to be designed by performing the Hamming window of length, M = 9 and cut off frequency, 0c = 1.2 rad/sec. Calculate the coefficients of the FIR filter. [22 marks] -0c00c 0 10 T (b) Identify the transfer function for the cascade structure realization for the system described by: y(n) = 0.1 y(n-1) + 0.72 y(n 2) + 0.7 x(n) - 0.252 x(n 2)