1.) For the integral below, try to guess a possible substitution. Make sure to justify your guess. Don't actually go through and solve '_he problem as the idea is to give you practice in choosirwmhich substitution to make. . . ' 7 _._._- . r . _ NEH)" f '5 d2: 2.) a} Sketch the region enclosed by the given curves. 2': = 1 3f; 2': = y2 1 b] Decide whether to integrate with respect to x or 3:. Explain your reasoning. c) Draw a typical approximang rectangle and label its height and width. cl} Then find the area of the region