16. May a person act as agent who is not capable of acting for himself?
17. May a person whose interests are opposed to those of his principal act as agent?
18. May corporations or partnerships serve as agents?
19. Must an agent's authority to act as agent be in writing?
20. May an agent be appointed or authorized to act by implied contract?
21. Define and give an example of implied contract.
22. What is meant by ratifying an act of an agent.
23. Give an example of a principal's ratification of an unauthorized act of an agent.
24. Give an example of a contract of agency which must be in writing.
25. Why must some contracts be in writing?