-) Using the graph below, what is the unit rate? An employee's wage у 480 420- 360- 300 Money earned ($) 240 180 120 60 2 4 14 16 6 8 10 12 Hours worked what is the unit rate

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?