Write VB.NET code for a reset button and a data validation function for a product form.

Here are the VB.NET solutions and explanations for the questions. QUESTION 2 a) VB.NET sub procedure for the Reset Button: This procedure clears the content of all TextBoxes and resets the ComboBox selection. `vb.net Private Sub btnReset_Click(sender As Object, e As EventArgs) Handles btnReset.Click ' Clear the ComboBox selection productIDComboBox.SelectedIndex = -1 ' Clear the TextBoxes productNameTextBox.Text = "" qualityTextBox.Text = "" ' Assuming 'qualityTextBox' is for Quantity priceTextBox.Text = "" amountToPayTextBox.Text = "" ' Optionally, set focus to the first input control productIDComboBox.Focus() End Sub ` b) validateData() function: This function checks if all controls have data, if Quantity and Price are numeric, and if a Product ID is selected. `vb.net Function validateData() As Boolean ' Check if Product ID is selected in the ComboBox If productIDComboBox.SelectedIndex = -1 Then MessageBox.Show("Please select a Product ID.", "Validation Error", MessageBoxButtons.OK, MessageBoxIcon.Error) productIDComboBox.Focus() Return False End If ' Check if Product Name is empty If String.IsNullOrEmpty(productNameTextBox.Text) Then MessageBox.Show("Product Name cannot be empty.", "Validation Error", MessageBoxButtons.OK, MessageBoxIcon.Error) productNameTextBox.Focus() Return False End If ' Check if Quantity is empty If String.IsNullOrEmpty(qualityTextBox.Text) Then ' Assuming 'qualityTextBox' is for Quantity MessageBox.Show("Quantity cannot be empty.", "Validation Error", MessageBoxButtons.OK, MessageBoxIcon.Error) qualityTextBox.Focus() Return False End If ' Check if Price is empty If String.IsNullOrEmpty(priceTextBox.Text) Then MessageBox.Show("Price cannot be empty.", "Validation Error", MessageBoxButtons.OK, MessageBoxIcon.Error) priceTextBox.Focus() Return False End If ' Check if Amount to Pay is empty (if it's an input field, otherwise it's calculated) ' Assuming it needs to be checked as per "All controls... must not be empty" If String.IsNullOrEmpty(amountToPayTextBox.Text) Then MessageBox.Show("Amount to Pay cannot be empty.", "Validation Error", MessageBoxButtons.OK, MessageBoxIcon.Error) amountToPayTextBox.Focus() Return False End If ' Check if Quantity is numeric Dim quantity As Decimal If Not Decimal.TryParse(qualityTextBox.Text, quantity) Then MessageBox.Show("Quantity must be a numeric value.", "Validation Error", MessageBoxButtons.OK, MessageBoxIcon.Error) qualityTextBox.Focus() Return False End If ' Check if Price is numeric Dim price As Decimal If Not Decimal.TryParse(priceTextBox.Text, price) Then MessageBox.Show("Price must be a numeric value.", "Validation Error", MessageBoxButtons.OK, MessageBoxIcon.Error) priceTextBox.Focus() Return False End If ' All validation checks passed Return True End Function ` QUESTION 3 a) Two business rules for data validation: 1. Quantity must be positive: The quantity of an item purchased cannot be zero or a negative number. 2. Price must be positive: The price of an item cannot be zero or a negative number. b) How variables are created in VB.NET: In VB.NET, variables are created using the Dim keyword, followed by the variable name, the As keyword, and then the data type. Optionally, an initial value can be assigned using the assignment operator =. This process declares the variable, reserving memory for it and specifying the type of data it can hold. Example: `vb.net Dim customerName As String = "John Doe" Dim productPrice As Decimal ` c) Explain the term syntax error with an example: A syntax error occurs when a programmer writes code that violates the grammatical rules or structure of the programming language. These errors are typically detected by the compiler or integrated development environment (IDE) before the program can run, preventing compilation. They are like spelling or grammar mistakes in human language. Example: If you write Dim myVariable As Intager instead of Dim myVariable As Integer, the compiler will flag Intager as a syntax error because Intager is not a recognized data type in VB.NET. 3 done, 2 left today. You're making progress.