PLEASE HELP ASAP!! In real life, the Mona Lisa measures 2 and 1/2 feet by 1 and 3/4 feet.

A company that makes office supplies wants to print a scaled copy of the Mona Lisa on the cover of a notebook that measures 11 inches by 9 inches.

What size (in inches) should they use for the scaled copy of the Mona Lisa on the notebook cover so that the picture is as big as it can possibly be but still fit on the paper? Show work please.

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?