2. Consider the following sequence x(n) = cos (2rn/3)sin(2rn/5). a. Is the sequence periodic? If yes, what is the period? If no, why not? Note: you need to show your work analytically but you can verify that your answer is correct by sketching the sequence using Matlab b. Find and sketch the complex exponential Fourier series coefficients (Magnitude and Phase). Verify using Matlab. Include code and graphics.