Open the Computer Solution.sln file contained in the VB2017\Chap08\Computer Solution folder. The interface allows the user to enter the number of either new or refurbished computers sold. Open the Code Editor window and locate the btnAdd_Click procedure. The procedure should use an array to accumulate the numbers sold by type. It also should display (in the labels) the total number sold for each type. Before the procedure ends, it should send the focus to the txtSold control and also select the control’s existing text. Code the procedure. Save the solution and then start and test the application.