$1.)$ What is the fundamental difference between changes that are initiated by the owner and a changes claim brought by a contractor?

$2.)$ What are the three categories of changes?

$3.)$ What are the three ways changes are accomplished according to the AIA A$201-2007$ Document, Article $7?$

$4)$ In the Watson Lumber Company v$.$ Guennewig case, what were the essential elements the contractor had to prove to win his claim of changes?

$5)$ What strategy might a contractor employ on a small project to cover small extras, rather than comply with the excessively formal requirements set forth by the court in the Watson case?