Using C# language, Complete the following Menu Windows Form program. Write the code for the Calculate menu according to the following instructions.

• The user should enter the marks for subject1 and subject2 in textbox1 and textbox2 respectively.
• If the user missed to enter the marks, then appropriate error message should be displayed.
• The mark should be between 0 and 100.
• When the Total menu clicked, the total mark should be calculated and the result should be placed in label1.
• When the Average menu clicked, the average of both marks should be calculated and the result should be placed in label2.

namespace MenuApp1 {

public partial class Form1 : Form {

public Form1() { InitializeComponent(); }

// Your answer goes here

}

}

Form3 1 X Calculate Total Subject 1 Subject 2 Total Avorago