Can someone help me? (The purple circle thingy comes with the questions)

Which of the choices shown could be used to prove that aacp=abcp ?

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?

Which spreadsheet would be used to compute the first nine terms of the geometric sequence a^n=32•(1/2)n-1