In the figure below, if a=5 feet, L=14 feet, and the respective weights of the diver and the board are 200 lb and 90 lb, find the reactions onto the uniform board at the pin A and the roller B.   

Z X Used with permission from Engineering Mechanics: Statics, McGill/King, 4th Ed.. 2003 O a. Ax = 0; Ay=396 lb down; and B = 686 lb up O b. Ax=0; Ay = 174 lb down; and B = 464 lb up OC. c. Ax = 0; Ay = 396 lb up; and B = 686 lb up Od. None of the above