Mirtha Mudflat has sufficient funds to choose one of two investments. The same amount will be invested in either case. Choice one: ten year $100,000 5% Treasury bonds issued to yield 4% per annum, the market rate. Choice two: a risky bond of the same amount that has expected cash flows of $9,000 per year for the same period. What is the risk premium that makes Mirtha indifferent between the two investments?