Please help What is the cell cycle?

1.process of duplication of genetic material
2.repeating process of DNAsynthesis
3.the time a cell spends actively dividing
4.repeating series of stages a dividing cell goes through

Sara goes on a slingshot ride in an amusement park. she is strapped into a spherical ball that has a radius 3*10^2 of centimeters. what is the volume of air in the spherical ball? use this formula: volume of a sphere=4/3pi,r^3 , where r is the sphere’s radius.