What is the fourth derivative of y = 2x - 4x4 + 3x3? O A. 24(9x - 4) O B. 36(6x - 5) O C. 48(5x - 2) O D. 60(4x - 5) O E. 72(3x - 8)At what points does the function f (a ) = as + 2x2 + a + 1 have horizontal tangent lines? O A. (-1, 1 ) and - 23 27 O B. (-1, -1) and 21 3 1 27 O C. (-1, 24 ) and (2, 1) O D. (1, -1) and 27 O E. (-2, 1) and (1, 27 Consider the region bounded by 41; : $2 and 2y : :13. a. Find the area bounded by the two curves. Show all work. b. Find the volume of the solid generated by revolving the region around the x-axis. Show all work. (3. Find the volume of the solid generated by revolving the region around the yaxis. Show all work