Watch significant digits, draw free body diagrams, watch direction where needed. Thank you

Question 4 (5 points) Two charged objects, m ] = 2.00 x 10- kg and m2 = 4.00 x 10- kg, accelerate horizontally in an electrical field of 5.00 x 100 N/C. The acceleration of m ] is 4.80 x 10-4 m/s2 and of m2 is 1.00 x 10-4 m/s. What is the charge difference between the two objects