a= 4

b= -5

(a) Given x(n) = 2n+ (a-b); for n from 0 to 15; where a and b are the last non-zero digits of your matric number. Calculate the DFT coefficients using DIFFET method. Please include full numerical calculations in your answer, otherwise you will not get full marks. 1 Add File (b)Demonstrate that the IDFT can be calculated using FFT method to get the x(n) sequence back. Please include full numerical calculations in your answer, otherwise you will not get full marks. 1 Add File