Estimating Signal Energy using numerical integration Find the energy of the signal y (t) = e^-0.5t(u(t)-u(t -1)) a) Analytically (Make sure to show all steps and highlight the final result. Both lab partners should show their work) b) Using the rectangular approximation and the quad function in MATLAB. How many rectangles do you need to get the rectangular approximation answer to match up to five decimal place of the analytical and quad answers