5. Using "help" and Plotting Graphs: Read about the meshgrid and surf functions and reference the built-in examples. This can be done by typing help surf or help meshgrid Given that -2.5 x 2.5 and -2.5 y 2.5, use these functions to create a surface plot for z = sin(x + y). Make sure you choose enough points for x and y to make the curve smooth. 6. Matrices: Given the matrices: [8 1 71 X 10 9 8 7 10 81 Evaluate the following expressions: a. X-Y b. XT + YT - ZT [-5 Y = -2 0-6] -3 -6 -3 c. Determinant of Y d. Element-wise Multiplication of X and Z e. Multiplication of Y and Z Z = -2 -3 2 1 -1 -3 4 1 5