The integral represents the volume of a solid of revolution. 27 / x 3 dx (a) Identify the plane region that is revolved. O plane region bounded by y = x2, y = 16, y = 0, x =0 O plane region bounded by y = x3, y = 16, y = 0, x = 0 O plane region bounded by y = x2, y = 0, x = 0, x =4 O plane region bounded by x = y2, x = 0, y =0, y = 4 O plane region bounded by y = x1/2, y = 0, x = 0, x = 4 O plane region bounded by y = x3, y = 0, x = 0, x = 4 (b) Identify the axis of revolution. O revolved around the line y = 4 O revolved around the line x = 16 O revolved around the line y = 16 O revolved about the x-axis O revolved around the line x = 4 O revolved about the y-axis