. Question 3 Consider the function f(x) - 9(x - 2) 2/3 Find the critical number Find the interval where f(x) is increasing Find the interval where f() is decreasing Find the interval where f(x) is concave down . Question 4 The function f(x) = 2x - 24x* + 72x + 2 has one local minimum and one local maximum. This function has a local minimum at x equals with value and a local maximum at a equals with value Question 5 > Consider the function f(x) = - 2x3 + 39x - 180x + 1. Find the critical numbers. On what interval(s) is f(x) increasing