Could I get some help with this, it would mean a lot. Thank you

Question 1 Two plastic balls, each of radius 8.30 cm, are placed so that there is a 48.5 cm space between them. The charge on one ball is +6.30 nC and the charge on the other is -2.70 nC. What is the magnitude of the electric field at a point directly midway between the two balls? 305 N/C O 344 N/C O 1.17x104 N/C O 764 N/C Question 2 A capacitor is formed by placing two circular disks, each of diameter 7.00 cm, a distance of 0.890 mm apart. The disks are charged so that the electric field inside the capacitor is 7.40x104 N/C. What is the charge on each disk? 10.1 nc 5.04 nc 0.720 nc 2.52 ncQuestion 3 A parallel plate capacitor is formed from two circular plates, each of radius 3.50 cm, separated by 4.90 mm. The plates are charged to $10.4 nC. A proton is shot from the negative plate to the positive. What launch speed must the proton have to just barely reach the positive plate? O 3.79x1o5 m/s 0 5.35x105 m/s 0 2.87x107 m/s 0 1.43x1o7 m/s