Two particles, each carrying positive charge q, are on the y axis, one at y=+a and the other at y=−a. part a calculate the potential for any point on the x axis. express your answer in terms of the variables q, x, a, and the coulomb's law constant k. v(x)v ( x ) = nothing request answer part b use your result in the previous part to determine the electric field at any point on the x axis. express your answer in terms of the variables q, x, a, the coulomb's law constant k, and the unit vector i^. use the 'unit vector' button to denote unit vector in your answer. e⃗ (x)e → ( x ) = nothing