Three point charges are located on the positive x-axis of a coordinate system. Charge q1 = 2.0 nCis 2.0 cm from the origin, charge q2 = -3.5nC is 4.0 cm from the origin and charge q3 = 4.5 nC located at the origin. What is the net force
((a) magnitude and
(b) direction)
on charge q1 = 2.0nC exerted by the other two charges?