5 An -=- particle (helium nucleus, 2 protons, and 2 nuetrons) is place between two stationary, charged objects as shown. It is 0.0030 meters to the right of the object carrying a +1.0 X 10^-12C charge and 0.0020 meters to the left of the object carrying a -2.0 X 10 ^-12 C charge. a What is the net magnitude and direction of the electrical force acting on the particle? I put 1.12 X 10^-15 N in the same direction and got the question WRONG. b. At what rate and in what direction will the particle accelerate? I put 3.4 X 10^11 m/s/s and also got it WRONG. Any help would be greatly appreciated. Im pretty sure I got the second one wrong since I got the 1st one wrong, and I have a feeling I got the 1st one wrong because I either added or subtraced wrongly, but Im confused about how I'm supposed to know the signs etc.