4. A discrete-time (DT) waveform originally sampled at 16 KHz is to be added to a music track sampled at 44.1 KHz. Assume resampling system shown below for up-sampling to 441 KHz.
(a) Determine the minimum integer value of M and L, respectively. (4)
(b) Decide the value of Gain L and the filter cutoff frequency of LPF (5)