USA law

There are various ways that the agency relationship can be created. Explain the following:

agency by agreement

agency by ratification

agency by estoppel

agency by operation of law

Do some quick internet research and find a court case that concerns an agency created by one of the above ways. Provide a brief summary of the case, and in detail, explain how the court came to its decision. (Do not copy and paste the case into your assignment--put into your own words). Do you agree with the decision?

Be sure to provide the source used for this assignment, or the assignment grade will be 0.