Scores of students are given in the accompanying file scores.pdf. Grade curve is also shown. Use Excel functions to return each student's letter grade on the exam and answer how many scores are in 40-59 60-69 70-79 80-89 and 90-100?

Return Student's Grade:

Student Score

Stu 1	63
Stu 2	98
Stu 3	59
Stu 4	44
Stu 5	70
Stu 6	77
Stu 7	49
Stu 8	72
Stu 9	48
Stu 10	65
Stu 11	91
Stu 12	69
Stu 13	78

SCORE	GRADE
90	A
80	B
60	D
70	C
0	F