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 =153,000 Year 1 cash flow =45,000 Year 2 cash flow =42,000 Year 3 cash flow =41,000 Year 4 cash flow =33,000 Year 5 cash flow =45,000 Year 6 cash flow =29,000