JAVA Create a file named Exam.java. In this file, create a method with the following signature:

public static double getAverage$($double d$1,$ double d$2,$ double d$3,$ double d$4,$ double d$5)$

This method will accept five doubles and return the average.

Also in Exam.java, create a method with the following signature:

public static char determineGrade$($double avg$)$

This method will take an average, then return the corresponding letter grade.