Q8 Given the below program, please answer the following questions: a) b) c) List variables used in the below event procedure List built-in functions in the event procedure List all the dot notations that combine a control name and a property name with a dot. d) Which control does the event procedure respond to? e f you type 123 into text box "a box", what are the values of a box.Text and a val respectively? f) If the value of variable Tempi" is 457.900, what is the value of Root1.Text? Roots rooti root2 Roots Cancel Control Names: Names in boxes are the control names. Introduction to Computer Programming& Numerical Methods 50 Chapter 3 Xudong Jia &Shu Liu Private Sub Roots Click (ByVal sender As System.object, ByVal e As System.EventArgs) Handles Roots.Click Dim Check as Double Dim A val, b val, cval as double Dim Tempi, Temp2 as double Dim Root1 val, root2 val as double A val val (a box. Text) B valval (b box. Text) C valval (C box. Text) checkb val b val -a val c val 4 If check