Download the file lab6.xlsx. The data in lab6.xlsx represents the grade of students in a class. Copy the data in lab6.xlsx and assign it in MATLAB to a variable gradenum. If the grade scale is such that A=90-100, B = 80-90, C = 70-79, and any number below 70 is F. Use gradenum to do the following

92	89	68	88	80
78	96	78	100	69
98	58	87	77	89
45	78	45	77	96
43	88	87	44	98
23	56	89	100	95
78	52	78	78	97
87	45	96	85	45
67	87	98	82	78
56	85	96	80	78
98	98	98	80	72
78	48	88	87	76
87	52	55	85	72
76	48	78	82	79
67	78	89	89	76
78	92	98	87	75
89	95	45	85	74
90	87	87	89	71
90	58	65	85	89
98	96	68	87	95

The number of students who got 78 (call it g78): Your commands:

The number of students who got A (call it gA):

Your commands:

Write all the commands in MATLAB that you will use to extract all the A values into one column vector. Call the vector GA.

What is GA(12

The number of students who got A or C:

Write all the commands in MATLAB that you will use to extract all the A and C values into one column vector. Call the vector GAorC.

What is GAorC(33)