Does anyone know how to do this ?

What term best describes a line and a point that lie in the same plane? a. congruent b. coplanar c. collinear d. equal

Simplify 24÷(-2)(3)+7 a. -29 b. 3 c. 11

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?