There is a cylinder and a ramp with a towel(lots of friction). The cylinder is giver a push up the ramp with the towel and it is allowed to roll up, stop, and roll back down. The acceleration when the cylinder is rolling up is -0.7318 m/s/s. The acceleration when the cylinder is rolling down is -0.2895 m/s/s. The mass of the cylinder is 0.1939 kg. What is the magnitude and direction of the frictional force?