EMERGENCY! Please give me the correct answer!

Can you answer my question? will mark brainiest!

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?

Rewrite the following quadratic functions in intercept or factored form. show your work. y = 9 + 12x + 4x^2