E Test: Final Exam This test: 30 point(s) possible Question 17 0f 30 This question: 1 point(s) possible Submit test Question list 0 Question 13 0 Question 14 Question 15 Question 16 0 Question 17 0 Question 18 Question 19 Question 20 | For the function below, nd (a) the critical numbers; (b) the open intervals where the function is increasing; and (c) the open intervals where it is decreasing. f(x) = 2.6 + 3.4x - 0.7x2 (a) The critical number(s) is/are t (Type an integer or a simplied fraction. Use a comma to separate answers as needed.) (b) List the interval(s) where the function is increasing. Select the correct choice below and, if necessary, ll in the answer box to complete your choice. U A- Increasing on ' (Type your answer in interval notation. Simplify your answer. Use integers or fractions for any numbers in the expression. Use a comma to separate answers as needed.) 0 B. Never increasing (c) List the interval(s) where the function is decreasing. Select the correct choice below and, if necessary, ll in the answer box to complete your choice. U A- Decreasing on ' (Type your answer in interval notation. Simplify your answer. Use integers or fractions for any numbers in the expression. Use a comma to separate answers as needed.) (:3 B. Neverdecreasing