Write program to read a list of exam grades given asint's in the range of0to100. Your program will display the total number of grades and the number of grades in each letter-grade category as follows:

A

93 <= grade <= 100

A-

90 <= grade < 93

B+

87 <= grade < 90

B

83 <= grade < 87

B-

80 <= grade < 83

C+

77 <= grade < 80

C

73 <= grade < 77

C-

70 <= grade < 73

D

60 <= grade < 70

F

0 <= grade < 60

Use a negative number as a sentinel value to indicate the end of the input. (The negative value is used only to end the loop, do not use it in your calculations.)

Each time you prompt the user to enter a grade you will print:

 Enter a grade: 

For example, if the input is:

 98 95 87 86 83 92 85 78 74 72 81 71 69 63 50 43 -1 

Please note that your class should be namedGrades.