What is the discount rate at which the following cash flows have a NPV of $0 ? Answer in %, rounding to 2 decimals. Year 0 cash flow =145,000 Year 1 cash flow =35,000 Year 2 cash flow =42,000 Year 3 cash flow =43,000 Year 4 cash flow =30,000 Year 5 cash flow =41,000 Year 6 cash flow =42,000