Hello, can I get a step-by-step explanation on these 3 questions?

Two spherical objects are separated by a distance of 1.05 x 10'3 m. The objects are initially electrically neutral and are very small compared to the distance between them. Each object acquires the same negative charge due to the addition of electrons. As a result, each object experiences an electrostatic force that has a magnitude of 3.53 x 10'20 N. How many electrons did it take to produce the charge on one of the objects? Number I Units ' 1' An electric field of 210000 N/C points due west at a certain spot. What is the magnitude of the force that acts on a charge of -6.5 /C at this spot? Number i UnitsA small object has a mass of 3.0 x 10" kg and a charge of -43 //C. It is placed at a certain spot where there is an electric field. When released, the object experiences an acceleration of 2.6 x 10 m/s in the direction of the +x axis. Determine the electric field, including sign, relative to the +x axis. Number Units