Question 7: Consider the polynomial p(x) given below. Write MATLAB statements to find its value when x =-2 using two different methods. The first method should evaluate the polynomial using a MATLAB function and the other should use regular MATLAB mathematical operations to get the results. 6 Marks] p5(x) - 3x6-2x32x2 Question 8: Write MATLAB statements to plot the following waveform in the interval Osts50. Also write statements to label X-axis as t and Y-axis as f(t). [5 Marks] y3 (1 e t/14) Hint: use the statement t = 0: 0.01: 50; to define the interval. Insert the screenshot of the plot and indicate the value of y when t 25. [2 Marks] Question 9: Write MATLAB statements to save as ASCIl text file the following waveform in the time interval Osts1. The time interval is to be split into 1024 points. [5 Marks]