Could i please get some help on this, it would mean a lot, thank you.

Question 1 First, a plastic rod is brought to a charge of i 2.8 nC. It is then brought to contact with a metal sphere, after which the rods charge becomes -5.50 nC. Which of the following is true? O 4.56 and\") electrons moved from the plastic rod to the metal sphere. F\\ k. 4.56 and\") electrons moved from the metal sphere to the plastic rod. 0 4.56 x 1019 electrons moved from the metal sphere to the plastic rod. , I \\ a 4.56 x 1019 electrons moved from the plastic rod to the metal sphere. Question 2 Two masses, each weighing 3.40 kg and each with a charge of +8.40 uC, are placed 2.30 m away from each other. What would be the magnitude of the electric force on one mass? O 3.28x104 N L2 0.276 N O 0.120 N Question 3 A + B (- C + In the figure above, the distance between charges A and B and the distance between charges B and C are both 1.50 cm. If A = 1.50 nc, B = -7.00 nC, and C = 3.00 nC, what is the net electric force on A? O 4.94x10 N to the right O 0.000375 N to the right O 4.94x10 N to the left O 0.000375 N to the left