13. Use Geogebra CAS to solve Question 94 from the Textbook Section 4.1 Exercises (page 268). * Define A(t) and find A'(t). * Use the Solve () command to find critical points. * Use the first derivative test by substituting values to verify where the function is increasing and decreasing. You should have two values. * Indicate on the graph where the function is increasing and decreasing, and add labels with the corresponding intervals. * Submit a screen shot of your solution and a written interpretation of the results. 94. AIR POLLUTION The amount of nitrogen dioxide, a brown gas that impairs breathing, present in the atmosphere on a bo certain May day in the city of Long Beach is approxi- mated by 136 A (t ) = 1 + 0.25(t - 4.5)2 + 28 (0 Sis 11) where A(t) is measured in pollutant standard index (PSI) and t is measured in hours, with t = 0 corresponding to 68. 7 A.M. Find the intervals where A is increasing and where A is decreasing, and interpret your results.80.0 -() Source: Los Angeles Times