PART A - Counter Increment and Securing ViewState

Implement a simple program that uses viewstate to store and retrieve counter value. Whenever Increment button is clicked counter should be incremented by 2? Write code behind below?
Extend the program implemented above and make the View State secure? Refer to the textbook for the technique of securing?

PART B - Storing and Retrieving Objects in ViewState

Consider the following definition of customer class. Develop a web form that stores three objects of customer in viewstate. Implement the code for retrieving customer objects also?

Public Class Customer
    Private _firstName As String
    Public Property FirstName() As String
        Get
            Return _firstName
        End Get
        Set(ByVal Value As String)
            _firstName = Value
        End Set
    End Property
    Private _lastName As String
    Public Property LastName() As String
        Get
            Return _lastName
        End Get
        Set(ByVal Value As String)
            _lastName = Value
        End Set
    End Property
    Public Sub New(ByVal firstName As String, ByVal lastName As String)
        Me.FirstName = firstName
        Me.LastName = lastName
    End Sub
End Class