Make a test class that will read in the data from the following file into an array of Grade objects. You are then to make methods in your test class to answer 2 of the following questions: What is the average grade in CPSC-39 for each of the years, for all of the students in that year? What is the average number of students in a CPSC-39 class for every separate year? Which computer Science Class has the highest amount of A's? (Computer Science classes have a course that contains the letters CPSC)