Step 3: Collect and Record Your own data! Ask exactly 25 people the same question as above (How many movies did you see in the last month). Record your data and Create a dot plot showing
your results.

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?