1. The problem statement, all variables and given/known data q1= 5 x 10^-6C position (1;2,-1) q2= -3 x 10^-6 C position (-2,1,3) a) what is the electric force caused by q2 on q1? (vector notation) b) what is the electric field at (0,0,0) 2. Relevant equations F = kq1q2/r^2 E= F/q 3. The attempt at a solution I really don't know how to start this problem. Since this problem is in 3D, I don't know how to find the z coordinate of the electric force. What I initially did was to find the electric force with Coulomb's law, but it gives me a number and not components. I tried to play with Pythagoras's theorem, but didn't figure anything out.