Figure below shows 3 point charges, q1= -5HC, q2= +4uC , and q3= +3HC arranged at the vertices of a right-angled triangle. The distance a =20 cm and b = 30 cm. What is the magnitude and direction of the electrostatic force acting on the third charge, q3 due to qi and q2 ? (E. = 8.85 x 10-12 C2/ N.m2) q1 a 90 93 92