The following array, grades, contains the grades (as percentages) for six students in one class. Each row corresponds to a student, with the first four columns corresponding to the four tests and the last column corresponding to the final exam.

grades = [45 60 68 78 83; 67 55 45 25 0; 88 78 87 67 65; 75 40 76 82 85; 20 56 78 79 67; 99 86 89 91 100]

The average of the four tests counts for 75% of the finals grade and the finals examination counts for 25% of the finals grade (FG). The actual letter grade is then determined from the following relationships:

		93 FG 100	A	90 FG < 93	A
87 FG < 90	B+	83 FG < 87	B	80 FG < 83	B
77 FG < 80	C+	73 FG < 77	C	70 FG < 73	C
65 FG < 70	D+	60 FG < 65	D	FG < 60	F

Write a MATLAB program that provides and displays (in order) a character output of A, A, B+, B, B, C+, C, C, D+, D, or F for each of the students and then displays an ASCII version of these characters stored in the 6 by 2 matrix called ascgrades (unneeded elements in the array should be assigned a value of zero). When writing this program:

i) Instead of using 6 or 5 anywhere in this program, corresponding to the dimensions of the array, use the size( ) command in locations such as the iteration loop limits.

ii) Use two nested for( ) loops to scan through the matrix.

iii) Use one or more if( )-else statements (with relational expressions) when determining the letter grade. Alternatively, a switch-case statement may be used if desired.