4. Write an m-file in MATLAB to do the following i) Ask user input for the angle theta (in degrees). Note angle input on graph. ii) Compute the following functions shown on the next page. iii) Plot f1, /2, and f3 vs r all on the same figure. Use three different markers and colors to differentiate the curves. Include labels on x-axis and y-axis, a title, and a legend. iv) Create a separate figure and plot fI vs x and f2, 3 vs x on subplots that are arranged vertically (i.e., 2 subplots with one above the other). Use the same markers and colors as above. Include labels for x-axis and y-axis, a title, and label curves by using the text command