(a) Find In correct units and appropriately rounded, find sales and rate of change of sales on : (6) July 2 (c) July 4 21. Use the First Derivative Test to find the intervals where the function is increasing and where it is decreasing and organize your results in a table with columns labeled: interval test point f increasing/decreasing sign of Write parentheses around each interval and each ordered pair. Also find all local extrema and write them as ordered pairs in a sentence using such phrases as local maximum" and local minimum". No abbreviations, please! x- coordinates should be exact and y-coordinates should be rounded to two decimal places. 22. Use the Second Derivative Test to find all local extrema as well as the point of inflection of the function. Write your answers in a sentence using such phrases as local maximum", "local minimum", and "point of inflection". No abbreviations, please! x-coordinates should be exact and y-coordinates should be rounded to two decimal places. (a) Find In correct units and appropriately rounded, find sales and rate of change of sales on : (6) July 2 (c) July 4 21. Use the First Derivative Test to find the intervals where the function is increasing and where it is decreasing and organize your results in a table with columns labeled: interval test point f increasing/decreasing sign of Write parentheses around each interval and each ordered pair. Also find all local extrema and write them as ordered pairs in a sentence using such phrases as local maximum" and local minimum". No abbreviations, please! x- coordinates should be exact and y-coordinates should be rounded to two decimal places. 22. Use the Second Derivative Test to find all local extrema as well as the point of inflection of the function. Write your answers in a sentence using such phrases as local maximum", "local minimum", and "point of inflection". No abbreviations, please! x-coordinates should be exact and y-coordinates should be rounded to two decimal places