Write a program that uses the main to read student scores from the keyboard, gets the best score using a method call to (Best), and then assigns/prints grades in another method call to (Assign)

AssignGrades.java

//*******************************************************************
//Assignment: AssignGrades
//Account: TAM154
//
//Author: Tori Murray
//
//Completion Time: 1 hour and 15 minutes
//
//Honor Code: I pledge that this program represents my own program code.
//
//*******************************************************************
package assigngrades;

import java.util.Scanner;

/**
 *
 * @author a_nog
 */
public class AssignGrades {

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
      //Add a scanner
        Scanner in = new Scanner(System.in);

        //Ask for number of students
        System.out.print("Enter the number of students: ");
        int Students = in.nextInt();
        int[] scores = new int[Students];

        //Ask for the students scores
        System.out.print("Enter " + Students + " scores: ");
        scores[0] = in.nextInt();
        scores[1] = in.nextInt();
        scores[2] = in.nextInt();
        scores[3] = in.nextInt();

        //Go to the grades method
        grades(scores);
    }

    //Method to show what the grades are
    public static void grades(int[] grades) {
        int highest = best(grades);
        
        for (int i = 0; i < grades.length; i++) {
            System.out.printf("Student %d score is %d and grade is %s%n",
                i, grades[i], assign(grades[i], highest));
        }
    }

    //Assign method assigns/displays the grades
    public static char assign(int grade, int highest) {

        if (highest - grade <= 10)
            return 'A';
        else if (highest - grade > 10 && highest - grade <= 20)
            return 'B';
        else if (highest - grade > 20 && highest - grade <= 30)
            return 'C';
        else if (highest - grade > 30 && highest - grade <= 20)
            return 'D';
        else 
            return 'F';
    }

    //Best method determines the best score
    public static int best(int[] grades) {
        int highest = grades[0];

        for (int grade : grades) {
            if (grade > highest)
                highest = grade;
        }

        return highest;
    }
}