Coulomb Force and Electric field. A charge q1= 7.00 µC is located at the
origin, and a second charge q2 = -5.00 µC is located on the x axis, 0.30 m
from the origin. (A) Find the electric field at the point P, which has coordinates
(0, 0.400) m. (B) If a charge q3 = -3.00 µC is placed at point P, what is the
coulomb force experienced by this charge due to other charges q1 and q2.
Include appropriate diagram for this problem with proper labels.