After a re destroyed a building's roof, shoring consisting of steel pipes was used to stabilize the walls as shown in the gure below. The shoring is attached to the wall at 20 ft above the ground and at 30 'om vertical and lies in a plane perpendicular to the wall. The force applied by the shoring acts along the axis of the pipe and applies a 2250 lb horizontal force to the wall at B. (a) What is the vertical component of the force? (b) Determine the unit vector along the line of action of, and with the same sense as, the force. (c) Find the Cartesian vector F that describes the force applied by the shoring to the wall.