Naomi is saving money and plans on making monthly contributions into an account earning a monthly interest rate of 0.35%. If Naomi would like to end up with $16,000 after 23 months, how much does she need to contribute to the account every month, to the nearest dollar? Use the following formula to determine your answer. A=d(i(1+i)n−1​)

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?