Anne Marcie and Bob Bruce entered into a binding bilateral contract. The terms of the contract included that Marcie was to build a hang glider for Bruce, and that Bruce was to pay Marcie $18,000 upon its completion. After formation of the contract, Bruce decided he did not want the hang glider; because the contract was advantageous, however, he assigned all of his rights there under and delegated his duty of payment to his friend Marc Shadoe. Shadoe paid Bruce $1,400 for the transferred right and immediately informed Marcie of the assignment. After Shadoe took delivery of the glider, he fled without paying Marcie. He was last seen by reliable sources gliding into Canada singing, "I did it my way." Characterize the contractual relationships of the parties and explain their respective rights.