The scale on a map is 1 cm: 6,6 km. The distance between two cities on the map is 18 cm, What is the actual distance between the two cities? 118.8 km B 108.6 km C 24.6 km D 2.7 km ​

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?