60. Norah took her car to We Fix Autos for repairs. She specifically directed the mechanic to repair the engine. Instead of repairing the engine, the mechanic replaced it with a rebuilt engine - a replacement engine from another car. Norah did not know this until she was received the bill for the work. The mechanic claimed that the replacement engine was the most economical thing to do.

Questions:

60.1 Was Norah liable for the cost of the replacement engine?

60.2 Does your answer change if We Fix Autos called Norah and told her that they recommend replacing the engine and does she agree. She agrees over the phone. But then she refuses to pay when given the bill.