Convert the following exercise using the appropriate "IF" data structure. Dim mark As Single mark = mrk Text Select Case mark Case Is 85 Labell Text- "Excellence" Case Is >= 70 Label2.Text= "Good" Case Is >= 60 Label3Text = "Above Average" Case Is 3- 50 Label4 Text= "Average" Case Else Label5.Text Need to work harder" End Select End Sub