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-CheckBox folder. Create an event-handling Sub procedure named ClearAmountDue and associate it with each check box’s CheckChanged event. Then, create a function that determines which (if any) check boxes are selected and then adds the associated fee to the total due. The function should return the total due to the statement that invoked it. Also, make the necessary modifications to the btnCalc_Click procedure’s code. Save the solution and then start and test the application.