Two blocks connected by a string are pulled across a rough horizontal surface by a force applied to one of the blocks, as shown ( The 3kg block is connected by a string to a 9 kg block [left to right]. The coefficient of friction is 0.2 and the angle of the string coming off the 9 kg block is 59 degrees) The acceleration of gravity is 9.8 m/s/s. If each block has an acceleration of 2.2 m/s2 to the right, what is the magnitude of the applied force? Answer in units of N