6. Find the area bounded by the curves y = x, y = 2 x and y = 1. 7. Find the area of the region enclosed between the curves y = x - 2x + 2 and -x+6. 8. Find the area of the region enclosed by y = (x-1) 2+3 and y = 7. 9. Find the area of the region bounded by x = 0 on the left, x = 2 on the right, y = x above and y = -1 below.