Enter following Matlab codes into editor and run to get answer and Figures. Attach "Publish" copy with answer including \%\% your name and Exam2 Problem 5. Hint: you need Chapter 4 Example Folder open to use "welch" command. a. What is the signal vector and size? b. Sketch Figures with only axis and title and location. Hint: subplot (1,2,1) and subplot (1,2,2). c. How the standard or unaveraged spectrum was calculated? List the Matlab code. d. What was the segment length used for averaging? Maximum overlapping points