3 5 89% + [12] 3. At the end of textbook section 4.1, there is a procedure titled Locating Absolute Extreme Values on a Closed Interval. Let's refer to this procedure as "the procedure from 4.1." 2 2 +5 Let f(x) = 2 a) Explain why it is not valid to apply the procedure from 4.1 to f(x) on the interval [-1, 4]. b) Explain why it is valid to apply the procedure from 4.1 to f(x) on the interval [1, 4]. c) Use the procedure from 4.1 to find the absolute maximum and minimum values of f(x) on [1, 4]. 6 70OF