Not again I am about to get mad how are they doing this okay imma be nice but like what is going on?

Which of the following statement about pascal's triangle are true?

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?

Evaluate 8j -k+148j−k+14 when j=0.25j=0.25 and k=1k=1.