You have been hired to enlarge the deck off the back of a house. When you put the current deck on a coordinate grid, the deck looks like the diagram below with AC and AB being walls of the house. The new deck is similar in shape, 7/4 times larger than the current deck, and AC and AB are part of the sides of the new deck

Using the existing framing for the sides of the deck against the house, how much additional framing for the sides does the new deck require?

What are the coordinates of the new posts on the corners of the deck that lie on AC
and AB?