In Exercises 2 through 6, determine the output displayed when the button is clicked on 2. Private Sub btnDisplay_Click(...) Handles btnDisplay.Click Dim num As Integer - 3 Do Loop Until num > 15 txtoutput.Text-CStr (num) End Sub 4. Private Sub btnDisplay_Click(... Handles btnDisplay.Click Dim total As Double0 Dim num As Integer -1 Do total +num num += 1 Loop Until num >= 5 txtoutput.Text CStr (total) End Sub 6. Private Sub btnDisplay_Click(...) Handles btnDisplay.Click Dim numTries As Integer 0 Dim Yr As Integer Dim msg As String -"In what year did the Beatles invade the U.S.?" Do numTries += 1 yr-Cint (InputBox (msg, "Try #" & numTries)) Select Case yr Case 1964 MessageBox. Show ("They appeared on the Ed Sullivan shown in "& "February 1964." & You answered the question "& "correctly in " & numTries & tries.", "Correct") Case Is 1964 MessageBox. Show ("Earlier than "& yr & ".") End Select Loop Until (yr - 1964) Or (numTries-7) If yr 1964 Then MessageBox. Show ("Your 7 tries are up, the answer is 1964.","Sorry") End I1f End Sub Assume that the responses are 1950, 1970, and 1964)