I need very simple java solution just using JOptionPane. I am in learning stage, and I use JGRASP.

80 82 77 44 35 77 88 89 93 94 72 83 85 75 75 87 86 94 93 58 68

Input: There will not be any input for this program. This is called a batch program because there will be no user interaction other than to run the program. The data that you will need is stored in the accompanying file call test1.txt. You will have to open the file and read the scores into the program one at a time.

Output: The output should include the following:

• The number of students who took the test.
• The number of students who received each of the letter grades A, B, C, D, F.
• The overall average for the class.

Output should be displayed in a single Message box.

less than 60 is F

60-69 is D

70-79 is C

80-89 is B

90 above is A