The following table is of profit, revenue, and number of employees of 10 companies. Profit US $ billion Revenue/employee No. of Employees US$ Exxon 11.6 96,170 122900 Royal Dutch 7.9 74,283 105000 British Petroleum 4.1 70,859 56450 Petrofina SA 2.7 67,395 69067 Texao In 2.8 92,108 29318 Elf Aquitaine 0.97 11,461 83700 ENI 3.6 37,416 80173 Chevron Corp 3.4 84,619 39364 PDVSA 4.4 84,820 56596 SK 0.125 4,085 30592 a) For the 10 companies, the mean profit per company is $ billion US. (Round answer to one decimal place.) b) The "overall" mean revenue per employee (i.e., for all employees of these firms combined) of the 10 companies is $ US (Round answer to nearest whole number.) c) The "overall" mean profit per employee is $ US/employee. (Round answer to nearest whole number.)