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 = -117,000 Year 1 cash flow = 45,000 Year 2 cash flow = 41,000 Year 3 cash flow = 39,000 Year 4 cash flow = 43,000 Year 5 cash flow = 32,000 Year 6 cash flow = 33,000