Complete the program below so that it prompts for and reads in a student's final class average (0.0 to 100.0), and prints out the letter grade the student should receive, based on the following table:

For example, if a student's final class average is 84.6, he has earned a letter grade of B.

Complete the following file:

import java.util.Scanner; /** This program reads a student's final class average, and prints out the appropriate letter grade. */ public class DoGrades { public static void main(String[] args) { // Print prompt to enter a final class average System.out.print("Enter final class average: "); // Read in final class average Scanner in = new Scanner(; double average = in.nextDouble(); String finalGrade; // Determine and print final grade // Your work here System.out.println(finalGrade); } }