The pulley system shown in the figure is used to lift a 61kg crate. Note that one chain connects the upper pulley to the ceiling and a second chain connects the lower pulley to the crate. The crate is rising with an acceleration of 2.9 m/s2 . Assuming the masses of the chains, pulleys, and ropes are negligible, determine the magnitude of the force and the tension in the upper chain. The tension in the lower chain is .859 kN