Name

CH$-13-3$: $(15$ points$)$

In the figure below, three $25\mathrm{.}00$ kg spheres are located at distances $d_1=30cm$ and $d_2=40cm.$ What are the $($a$)$ magnitude and $($b$)$ direction in polar form $($relative to the positive direction of the $x$ axis$)$ of the net gravitational force on sphere $C$ due to spheres A and $B?$ Answer$=4\mathrm{.}010^-7$ N how do I get there?