Use MATLAB to solve the following calculus problems. c.1. Find the point Xmax at which the function 3 ex f(x) + 5x + 8 V1 +22 is globally maximized. (Your solution should be accurate to at least two decimal places.) c.2. Compute fe-rdx. c.3. Plot f(x) e-22 for x E (-5,5) and use MATLAB's built-in command area.m to indicate the area under the graph that you computed in (c.2). =