You and your friend are trying to decide where to have dinner. Restaurant #1 has an average price of $20 per person and is 5 miles away. Restaurant #2 has an average price of $30 but is only 1 mile away. (a) Determine the set of all restaurants which would create a decoy and cause your friend to choose restaurant #1. (b) Determine the set of all restaurants which would cause your friend to choose restaurant #2.