5-12 Sketch the region enclosed by the given curves. Decide whether to integrate with respect to x or y. Draw a typical approxi- mating rectangle and label its height and width. Then find the area of the region. 5. y = x + 1, y= 9 – x², x = -1, x = 2 6. y sin x, y = x, X = T/2, X= T 7. y (x- 2), y = x 8. y x-4x, y 2x