In a system over thee corner of a table with a frictionless mass less pulley. where block A is on the table with block C ontop of block A and block B is hanaging by a massless rope off the side of the table, blocks A and B have weights of 42 N and 22 N, respectively. (a) Determine the minimum weight of block C to keep A from sliding if µs between A and the table is 0.21. (b) Block C suddenly is lifted off A. What is the acceleration of block A if µk between A and the table is 0.11?