A few small vb questions

1. What does the following statement do?  I am doing some review and cannot figure a few of these out.

outputLabel.Text = someListBox.Items(someListBox.SelectedIndex))


2. what is th value of I?

Dim n As Integer = 0
Dim i As Integer
Dim j As Integer

For i = 0 To 5
      For j = 0 To 5
           n += 1
      Next j
Next i

3. what is the value of I?

Dim i As Integer
For i = 0 To 10
        If i = 5 Then
             Exit For
        End If
Next i

4. What is wrong with the following loop?

Dim i as Integer
For i = 20 To 0
 '(some code)
Next i

5.  Which of the following loops will execute at least once and will end when the condition becomes True?


 
  Do While condition / Loop  
  Do Until condition / Loop  
  Do / Loop While condition  
   Do / Loop Until condition