Please help 10points

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?

Identify this conic section. x2 - y2 = 16 o line circle ellipse parabola hyperbola

Find the missing factor. write your answer inexponential form.9^2=9^4×