Two point charges q1 and q2 are fixed in place, 6 cm apart. Another point charge with a charge of Q = -2 C and mass m = 0.5 g is initially located 5 cm from each of these charges. You observe that the acceleration of Q is 350 m/s^2 in the +i direction. Ignoring all gravitational forces, apply Newton's Laws to charge Q to determine both the magnitude and sign of q1 and q2.