The smallest value of math4 is % , while the largest value of math4 is % . The range of minimum and maximum pass rate values is feasible because: both the minimum and maximum values are between 0% and 100%. both the minimum and maximum values are greater than 0%. the minimum value is greater than 0%. both the minimum and maximum values are less than 100%.

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?