Array Of Grades - Tally How Many As And Bs

I've been asked to write a program that uses an array of grades, and to tally how many A's, B's etc ... The tallies are coming up incorrectly ... I'm putting the instructions at the end of this post to show what I should be getting.

import javax.swing.JOptionPane;

public class GradeCalculation {
public static void main(String[] args) {
//define array, grade values, and tally the amount of each grade
int grade[] = { 90, 100, 80, 85, 63, 73, 80, 92, 90};
int sum = 0;
int gradeA = 0;
int gradeB = 0;

[Code] ....

The assignment: Add logic inside the for loop to test if the number is between 90 and 100. If it is in this range, then add 1 to the tally of a gradeA. You should have another test to see if the number is between 80 and 89 and if it is it should add 1 to the tally of gradeB. You should continue to have tests for 70 to79 being gradeC; 60-69 being graded; and below 60 as being gradeF. After the for loop is done, you should display a list of how many students had A's, B's, etc. in the output message box.

Then the message box should display something like this:

The sum is 753
The average is 83
The largest test score is 100
The lowest test score is 63
The number of students with scores of 90-100 (A) is 4
The number of students with scores of 80-89 (B ) is 3
The number of students with scores of 70-79 (C ) is 1
The number of students with scores of 60-69 (D) is 1
The number of students with scores below 60 (F) is 0