The income from operations and the amount of invested assets in each division of Devon Industries are as follows: Income from Operations Invested Assets Sporting Goods Division $93,600 520,000 Health Care Division 52,500 350,000 Commercial Division 83,600 380,000 a. Compute the rate of return on investment for each division. (Round to the nearest whole number.) Division Percent Sporting Goods Division % Health Care Division % Commercial Division % b. Which division is the most profitable per dollar invested?