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6. Some function values of a function f with continuous second derivative f\" are given below. (a) 1 (b) 2 (c) 3 (d) 4 (e) 5 8. The base of a solid sitting on the my~plane is the region enclosed by the graphs of y = 43in a: and the y = sin(2:c), for 0 S a: 5 7r. Suppose that each cross section of the solid perpendicular to the xaxis is a semi~disc. Find the volume of the solid. 9. The graph of the function y = x3/3 for 0