A plate of cafeteria food is on a horizontal table. You push it away from you with a constant horizontal force of 14.0 N. The plate has a mass of 0.480 kg, and during the push it has an acceleration of 12.0 m/s2 in the direction you are pushing it. What is the magnitude of the net external force on the plate during the push? What are the magnitude and direction of the friction force that the table exerts on the plate during the push?