Will mark brainliest factor x² + 5x + 6. a)(x + 1)(x + 5) b)prime c)(x + 2)(x + 3) d)(x + 1)(x + 6)

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?