A boy is running at -8 m/s and a girl running at -2 m/s. Who is running faster?. (Please give a physics answer and explain, brainliest for best explanation)

Point charges q1 = 51 µc and q2 = −27 µc are placed 1.0 m apart, with q2 on the right. what is the force (in n) on a third charge q3 = 19 µc placed midway between q1 and q2? (assume the positive direction is to the right. indicate the direction with the sign of your answer.)