Easy question I need it rn it’s due tomorrow

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?

Find │–14│ a. 14 b. –14 c. start fraction 1 over 14 end fraction

Find all the angles that satisfy the equation cos(θ)=32