The graphs of x = 6, y = f(z) (solid) and y = g() (dashed) are shown; the graph is not drawn to scale. B Region One A Q The points labeled are A = (6, 4), B = (6, 6), C = (4, 5), and D = (1, 0). Suppose the portion of Region One in the First Quadrant is revolved around the y-axis. Select the expression(s) needed to find the volume of the solid of revolution formed when the region is revolved around the y-axis. Of T ( (9 ( 2 ) 2 - ( f ( 2 ) ? ) de - / 7 ( ( 72 - (9(2 ) ? ) da - / T ( 7 2 - ( 1( 2 ) ? ) de 27z(9(2) - f(2) da 27z(7 - f(z) da 27x(7 - 9(2)) dr