I need some help in finding a way to solve the following problems.: - Two equal positive charges q are on the y axis, one at y= +a and the other at y= -a. a) Show that the electric field on the x axis is along the x axis with Ex= 2kqx(x2 + a2)-3/2. b) Show that near the origin, when the x is much smaller than a, Ex is approximately 2kqx/a3. c) Show that for values of x much larger than a, Ex is approximately 2kq/x2. Explain why you would expect this result even before calculating it. Thanks for your efforts!