The example of the signal x is provided in Q3

I need the code for Q5 plz

5. The Fast Fourier Transform is a version of the DFT which implements faster calculations when NO is a power of 2. Determine how much speed improvement is created A. Create a signal 1ike x in part (3) with a vector n of 1024 values. Run the fft of this signal 20 times and record the time elapsed. This can be accomplished by running the MATLAB tic" command before the loop and toc" command after the loop. B. Do the same as (a) above but with a vector with 1023 values C. What is the difference in the amount of time for the calculations? Note: Show the results of this calculation on command window