The income from operations and the amount of invested assets in each division of Magentic Zero Industries are as follows: Income from Operations Invested Assets Retail Division $343,200 $1,320,000 Commercial Division 320,000 1,600,000 Internet Division 176,000 800,000 a. Compute the rate of return on investment for each division. Division Percent Retail Division % Commercial Division % Internet Division % b. Which division is the most profitable per dollar invested?