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9&nb= sp;        Computing an Average=

An instructor has asked you to develop a Visual Basic >NET application that takes four test scores and computes an average.  The scores can range from 50 to 100.  Use NumericUpDown controls to input the scores, and a ReadOnly TextBox control to display the result.  As te value changes in the NumericUpDown control, cha= nge the average using the OnChange event of the NumericUpDown control.  Use Visual Basic >NET Help for more information about the OnChange event.  Include only one button for allowing scores to be reset to their def= ault value of 100.