7. The conical container in Fig. 18 is filled with loose grain which weighs 40 pounds/ft. Answer parts 7a and 7b and show work. Fig. 18 7a. The work done lifting all of the grain over the top of the cone is most nearly which of the following? A. 9253 |b*ft B. 10723 lb*ft C. 11525 lb*ft D. This is a job for Wonder Woman! E. None of these 7b. The work done lifting the top 2 feet of grain over the top of the cone is most nearly which of the following? A. 1053.2 lb*ft B. 2100.9 1b*ft C. 2806.5 lb*ft D. None of these