particle 1 with charge q1 = 10.5 C is located at coordinates (x1,y1) = (-3, 3) m and particle 2 with charge q2 = -9 C is located at coordinates (x2,y2) = (4, 0) m. If you assume the potential vanishes at infinity, the potential will be zero at some point (x0,0) with -3 m < x0 < 1 m. What is an expression for x0 in terms of q1, q2, x1, and x2? What is the numerical value of x0? How do I find an expression for the magnitude of electric field E0 at point (x0,0) in terms of q1, q2, x1, and x2? How do I find the numerical value of E0, in newtons per coulomb%