GasEnhancer is a recently developed additive to gasoline that promises to provide improved engine performance. It is manufactured and marketed by the EnerCon Company. Being a new product, the annual demand for GasEnhancer is not known. But subjective estimates of demand based on EnerCon's market research make it seem reasonable to assume that demand will be normally distributed with a mean of 50,000 and a standard deviation of 12,000. Assume that demand during each of the next 10 years is an independent random number from this distribution. EnerCon needs to determine how large a GasEnhancer plant to build to maximize its expected profit over the next 10 years