Master and its Content Page

This below code is runing good but I want ti assign value to visibility property of panel's from master page, pannel's placed on content page.

Code of content page

public partial class _Default : System.Web.UI.Page
{

public void Page_Load(object sender, EventArgs e)
{

}
public void LinkButton1_Click(object sender, EventArgs e)
{
Panel3.Visible = false;
Panel4.Visible = false;
Panel5.Visible = false;
Panel2.Visible = true;
}
public void LinkButton2_Click(object sender, EventArgs e)
{
Panel2.Visible = false;
Panel4.Visible = false;
Panel5.Visible = false;
Panel3.Visible = true;
}
public void LinkButton3_Click(object sender, EventArgs e)
{
Panel2.Visible = false;
Panel3.Visible = false;
Panel5.Visible = false;
Panel4.Visible = true;
}
public void LinkButton4_Click(object sender, EventArgs e)
{
Panel2.Visible = false;
Panel3.Visible = false;
Panel4.Visible = false;
Panel5.Visible = true;
}
}