3 point charges are placed on the x-y plane: a +50.0 nC charge at the origin, a -50.0 nC charge on the x-axis at 10.0 cm, and a +150 nC charge at the point (10.0 cm, 8.00 cm).
(a) Find the total electric force on the +150 nC charge due to the other two.
(b) What is the electric field at the location of the +150 nC charge due to the presence of the other 2 charges?