Study each of the following case. Answer the questions that follow with Yes or No.

Li, an architect, designed a large ranch-type house for Spadacini. Within two years after construction, the house began to tilt to one side. Li argued that he was not to blame as the house was designed properly and that the problem was due solely to the negligence of the contractor. Spadacini produced the original contract, which called for Li to supervise the work of the contractor.
a. Can the architect be held responsible for the substandard work of the contractor?
b. Does the architect have a course of action against the contractor?
c. Can Spadacini share some of the blame for not supervising the work as well?