A 10-lb block B rests as shown on a 20-lb bracket A. The coefficients of friction are u_s=0.3 and u_k=0.25 between block B and bracket A, and there is no friction in the pulley or between the bracket and the horizontal surface. (a). Determine the maximum weight of block C if block B is not to slide on bracket A. (b) If the weight of block C is 10 percent larger than the answer found in a, determine the accelerations of A, B,and C.