Aproject that provides annual cash flows of $ 11,700 for nine years costs \$63,000 today. is this a good project if the required return is percent? what if it's 20 percent? at what discount rate would you be in different between accepting the project and rejecting it?

Set $r$ is a set of rectangles such that (1) only the grid points shown here are used as vertices, (2) all sides are vertical or horizontal and (3) no two rectangles in the set are congruent. if $r$ contains the maximum possible number of rectangles given these conditions, what fraction of the rectangles in set $r$ are squares? express your answer as a common fraction.