A point charge Q1 = 70 nC, is located at the point (-0.5 mm, 1.0 mm) of an xy plane. Another charge, Q2 = -90 nC, is at the point (-2.0 mm, -9.0 mm). Find the y component of the electric force vector [in N] (acted on charge Q2 by charge Q1). We assume that the charges are in the air (1) and k = 1/(40)=9 x 109 Nm2/C2