A Board with a Length of 7 $\circ$ with the Horizontal,as Shown in the Figure

Multiple Choice

A board with a length of 7.00 m and a mass of 50.0 kg is attached by a large bolt to a support at a distance of 3.00 m from one end.The board makes an angle of 30.0 ^$\circ$ with the horizontal,as shown in the figure.A mass of 220 kg is attached with a rope to one end of the board,and a second rope is attached at a right angle to the other end of the board.Find the magnitude of the force exerted on the board by the bolt.

A) 1350 N
B) 2650 N
C) 3810 N
D) 3880 N
E) 8480 N