Finding normal force - friction

[Moe_slow]

Homework Statement

the pic is in the attachment. and i am supposed to find the normal force. the object is in equilibrium.

The Attempt at a Solution

i tried to separate the Fg into its components but the angle is unknown. i can't seem to use any other method. force of friction is unknown and so is the coefficient.

 

[Moe_slow]

any hints?