please answer these three questions! show your work so that i can understand why you came to that conclusion. thank you very much!!

Which of the arrows is in the direction of the net force on the charge q? +Q -Q a) b) C) d) e) A 3 C charge is placed in a uniform electric field in empty space. The charge feels an electric force of 12 N. If this charge is removed and a 4 C charge is placed at that point instead, what force will it feel? O ON O 9N 18 N O 16 N O 12 N It requires work to move a charge along a line of constant potential. O True O False