/** This class stores a numeric course grade. It contains a method to convert the numeric values to a letter grade string.

Letter grades are A B C D F, possibly followed by + or -. Their numeric values are 4, 3, 2, 1, and 0. There is no F+ or F-. The + increases the numeric value by 0.3, a - decreases it by 0.3. However, an A+ still has the value 4.0. All other grades have the value -1.

For example, the number 2.8 (which might be the average of several grades) would be converted to B- (since a B- is 2.7). Break ties in favor of the better grade; for example, 2.85 (midway between 2.7 B- and 3.0 B) would become a B. Any value greater than or equal to 4.15 should be an A+. As another example, the number 0.4 should be what? Well, an F is 0 and a D- is 0.7, so anything from 0.35 and up is at least a D-. */ public class CourseGrade { public static final double APLUS = 4.15, A = 3.85, AMINUS = 3.5, BPLUS = 3.15, B = 2.85, BMINUS = 2.5, CPLUS = 2.15, C = 1.85, CMINUS = 1.5, DPLUS = 1.15, D = 0.85, DMINUS = 0.35 ; private double grade ; /** Initialize instance variable grade to the given value @param grade the numeric grade */ public CourseGrade(double grade) { this.grade = grade ; } /** Converts the numeric value stored in the instance variable grade to the corresponding letter grade @return the letter grade string. */ public String getLetterGrade() { //-----------Start below here. To do: approximate lines of code = 26 // return the value corresponding to the numeric grade stored in instance variable grade //Use the constants defined above. //-----------------End here. Please do not remove this comment. Reminder: no changes outside the todo regions. } /** Returns a string representation of the numeric grade value @return the string representation of the numeric value stored in grade */ public String toString() { return "" + grade ; } }