Find the area of the region bounded by y2 = 4 x, x = 1, x = 4 and the x-axis in the first quadrant.
Find the area of the region bounded by y2 = x - 2, x = 4, x = 6 and the x-axis in the first quadrant.
Find the area of the region bounded by x2 = 4 y, y = 2, y = 4 and the y-axis in the first quadrant.
Find the area of the region bounded by x2 = 16 y, y = 1, y = 4 and the y-axis in the first quadrant.