Hi this is a mixed review from physics pls help me understand and answer these 6 questions thank you

12. A 14 kg ball is resting on the surface of a planet with a mass of 710 2kg. The ball is experiencing a gravitational force of 131 N. Calculate the radius of the planet. 13. The nucleus of a certain ion has a positive charge of 1.07x10-16 C and the electron cloud for that ion has a total negative charge of 1.56x10-14 C. If the electron cloud is an average of 5.89x10"- m away from the nucleus, calculate the magnitude of the electromagnetic force between them. Your answer should not be in scientific notation and should be accurate to the ten thousandths place.| 14. Try to search for the magnitude of the net force on charge q2 given the following information: q: has a charge of 6.2 C, q has a charge of -3.5 C, q3 has a charge of 5.1 C, q is 0.5 m from q, and q is 1.4 m from q. 16. Calculate the the resistance of the 3 given the following information: the battery is 181 V. R. is 14 ohms, R2 is 7 ohms, and the current through R. is 4 amps. R3 17. Calculate the total power of the circuit given the following information: the battery is 117 V. R. is 19 ohms, R. is 21 ohms, and R. is 38 ohms. R. B W