1) The structure shown below occurs at the base of a large
statue. Because of the form of the statue, it exerts an
850 lb force, F, as shown below on the structure. The
component of F acting along member AB (from B
towards A) has a magnitude of 650 lbs. The angle \theta
between F and AB is 30°. Find \phi and the component of
the force that acts along member BC. All lengths and
angles drawn in the image are approximate. (7 points)