In this exercise, you modify one of the Seminars applications from Chapter 4’s Apply lesson. Open the Seminars Solution.sln file contained in the Seminars Solution-RadioButton folder. Create an event-handling Sub procedure named ClearDue and associate it with each radio button’s CheckedChanged event. Then, create a Sub procedure that determines the appropriate fee, which is based on the selected radio button. Also, make the necessary modifications to the btnCalc_Click procedure’s code. Save the solution and then start and test the application.