A 6-kg block and a 4-kg block are stationary on a horizontal friction-less surface as shown in the figure. The two blocks are then accelerated by applying a +30-N force that pushes from the left-side of the larger block along with the smaller one.           a) Determine the force that the 4-kg block exerts on the 6-kg block?        b) Determine the direction and magnitude of the acceleration of the larger block (6-kg)?

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