The point charges in the figure below are located at the corners of an equilateral triangle 25.0 cm on a side, where qb= +11.0 C and qc = -6.60 C. (Assume that the +x-axis is directed to the right.) 96 94 9c (a) Find the electric field at the location of da magnitude N/C direction (counterclockwise from the +x-axis) (b) What is the force on qa, given that qa = +1.50 nC? magnitude N direction (counterclockwise from the +x-axis)