4. Consider the function Find the volume of the solid formed by rotating the region bound by this function and the xaxis about the xaxis. [3 marks] 6. Consider the implicit function x2y - 2= 5x +y. a) Use implicit differentiation to show that dy 5 - 2xy [2 marks] dx x2 - 1 b) By using implicit differentiation again and your result from Part a, show that day 6x2y + 2y - 20x dx2 (2:2 - 1) 2 [3 marks]