5. Write a MATLAB function that reads as input a numeric grade from 0 to 100 and returns a letter grade. It displays an error message and terminates in the event that the user enters a value less than zero or greater than 100. Test your function in the command window. 6. Assume the following matrix X is stored in the current workspace: 2 4 8 6 X = 1 7 3 4 3 5 6 9 1 2 4 5 Create a new matrix Y from X which will produce the following matrix: Y = 1 7 3 3 5 6