The prot function [in millions} for a beverage company for the years 2010 through 21115 can be approximated by x} = 233:2 + Yde 3571, where x=1U corresponds to the year 2010. [a] During what year did a local maximum prot occur\"? [b] What was the maximum prot? If ..... 1 [a] A local extremum occurs at a critical number of f. Because the derivative exists for every x, the only critical numberlfs} occur where the derivative is zero. Find the derivative of x]. t'txi = [I A local maximum prot occurred in the year D. [h] The maximum prot was $|:| million. (Simplify your answer. Round to the nearest integer as needed.)