Open the Professor Juarez Solution.sln file contained in the VB2017\Chap08\Professor Juarez Solution folder.
a. Open the Code Editor window and locate the btnDisplay_Click procedure. The procedure declares and initializes two parallel one-dimensional arrays named strNames and strGrades. Code the procedure to display the names of students who have earned the grade selected in the lstGrades control. It should also display the number of students who have earned that grade. 

b. The first item in the lstGrades control should be selected when the interface appears. Code the appropriate procedure. 

c. The contents of the lstNames and lblNumber controls should be cleared when a different grade is selected in the lstGrades control. Code the appropriate procedure.
d. Save the solution and then start and test the application.