Hand written solution required

1. Three point masses are arranged as shown in Figure. (a) Find the net gravitational field at point P (show the direction of g from each mass at point P and express the net g in unit vector notation). (2 points) (b) What is the gravitational potential energy of the system of the three point masses? (1.5 points) (c) What will be the net gravitational force (in unit vector notation) on the fourth mass of 4m? (1 point) m 2a 3m 2m 2a P