Shamonjii makes $56,000.00 annually. their employer pays 75% of their annual insurance cost of $11,000. if they are single, claim 2 allowances and get paid weekly, how much should their weekly paycheck be? (deduct sst, medicare tax, fit and group insurance)

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?