A massless rod of length L = 1.4 m stands up straight, fixed to the ground by a bolt. A horizontal force of 8.4 N is applied at a vertical distance...

A massless rod of length L = 1.4 m stands up straight, fixed to the ground by a bolt. A horizontal force of 8.4 N is applied at a vertical distance of L/2 to the right. To counter this force and keep the rod stationary, a wire is fixed at the top of the rod and attached to the ground some distance away to the left, making an angle of 45 degrees to the horizontal.

What is the tension in the wire, in N?