6. (10 points) In the figure, a square of edge length 2.0 m is formed by four spheres of masses mi = 5.0 kg, ma = 3.0 kg, ma = 2.0 kg, and ma = 6.0 kg. What are the magnitude and direction (relative to the positive direction of the x axis) of the net gravitational force from my ma, and ma on ma? mz X m14 ms