A coordinate plane is shown. Triangle EFG has vertices F at negative 2 comma 0, E at negative 2 comma 1, and G at negative 3 comma 0. Triangle E double-prime F double-prime G double-prime has vertices E double-prime at 8 comma 4, F double-prime at 8 comma 0, and G double-prime at 12 comma 0. Which set of transformations has been performed on triangle EFG to form triangle E"F"G"?

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?