Find the volume of the sphere. Either an exact answer in terms pie or use 22/7 for pie

If you answer 2+2 you will get over 80 points

Each person in an it department of 25 people works on at least one of 3 major projects: system security, program implementation, platform development. 10 people work on system security, 13 work on program implementation, and 12 work on platform development. 4 people work on system security and platform development, 5 people work on program implementation and platform development, and 2 people work on all three projects. how many people work on system security and program implementation?

Car a and car b were in a race .the driver of car b claimed that his car was twice as fast as car a