True or False: If Bob's Fire Engines were a competitive firm instead and $100,000 were the market price for an engine, decreasing its price from $100,000 to $50,000 would result in the same change in the production quantity and, thus, total revenue.

Statistical process control charts: a. indicate to the operator the true quality of material leaving the process. b. display upper and lower limits for process variables or attributes and signal when a process is no longer in control. c. indicate to the process operator the average outgoing quality of each lot. d. display the measurements on every item being produced. e. are a graphic way of classifying problems by their level of importance, often referred to as the 80-20 rule.