A person invested $7800 for 1 year, part at 7%, part at 9%, and the remainder at 14%. The total annual income from these investments was $889. The amount of money invested at 14% was $800 more than the amounts invested at 7% and 9% combined. Find the amount invested at each rate. . .. The person invested $ at 7%, $ at 9%, and $ at 14%.Three students buy lunch in the cafeteria. One student buys 6 hamburgers, 6 orders of fries, and 1 soda for $25. Another student buys 1 hamburger, 1 order of fries, and 1 soda for $4. The third student buys 1 hamburger and 1 order of fries for $4. If possible, find the cost of each item. Interpret the results. Select the correct choice below and, if necessary, fill in any answer boxes within your choice. O A. The cost of a hamburger is $ . The cost of an order of fries is $ . The cost of a soda is $ (Round to the nearest cent as needed.)