Please help me with Business Calculus homework

Q.

A book designer has decided that the pages of a book should have 1-inch margins at the top and bottom and 1/2 - inch margins on the sides. Each page in the book must have a total area of 50 square-inches. Determine the page dimensions that will result in the maximum printed area (printed area is within the margins). Also give the page dimensions, printed area dimensions, and area of the printed area. (Recommendation: Draw a picture. )