Create a form named GradeTopDown that lets you to do the following:

• Enter a score (0–100) and a name into two different text boxes and compute the letter grade by clicking a button
• Use the scale 90, 80, 70 for A, B and C, respectively. The structure chart of the task to process the grade is as follows:

 

The Click event handler of the button must call three separate methods, corresponding to the three subtasks, described below:

1. A method named ValidScore that gets the name and score from the TextBoxes, validates the score and passes the name and valid score to the Click event handler.
2. A second method named Grade that computes the letter grade. Pass the score from the calling program to Grade. The method must return the letter grade without using a parameter.
3. A third method that displays the name and letter grade. Pass the name and letter grade as parameters to this method.
    

Get Valid Score Score Process Grade Score Grade Grade Score, a Grade Display Score & Grade