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Three point charges are located as follows: q1= (0,0) m, q2= (0,-0.120) m, q3= (0.272,0) m. Take q1= 4.37 x 10-9 C, q2= -3.00 x 10-9 C, q3= 6.41 x 10-9 C.

a) Find the vector electric field that the q2 and q3 charges together create at the origin. What are the x- and y-components of the electric field?

b) Find the vector force on the q1 charge. What are the x- and y-components of the force?

I have tried using the summation of Coulomb's Law and a dozen other approaches, that I can't really describe because they were so haphazard. Any help would be greatly appreciated. Thanks!