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The function A(x) = 0.004x - 0.05x" + 0.18x + 0.03 approximates the blood alcohol concentration in a person's bloodstream x hours after drinking 8 ounces of a hard liquor. The function only applies to the interval [0,5). On what time intervals is the blood alcohol concentration increasing? On what intervals is it decreasing? Determine the interval(s), if any, on which the blood alcohol concentration is increasing. Select the correct choice below and, if necessary, fill in the answer box to complete your choice. O A. The blood alcohol concentration is increasing on the time interval(s) (Type your answer in interval notation. Use integers or decimals for any numbers in the expression. Round to the nearest hundredth as needed. Use a comma to separate answers as needed.) O B. The blood alcohol concentration is never increasing.The stock price for a certain corporation can be approximated for the years 2007 through 2015 by f(x) = 5.2x - 96x + 479, where x =7 corresponds to the year 2007. During what year did a local minimum stock price occur? A local extremum occurs at a critical number of f. Because the derivative exists for every x, the only critical number(s) occur where the derivative is zero. Find the derivative of f(x). f' (x) =]