You read in the Wall Street Journal that 30-day US treasury bills are currently yielding 8%.

You read in the Wall Street Journal that 30-day US treasury bills are currently yielding 8%. Your brother in law, a broker, a broker at Kyoto Securities, has given you the following estimates of current interest rate premiums: inflation premium= 5.0% liquidity premium= 1.0% maturity risk premium= 2.0% default risk premium= 2.0% Based on this data, the real risk-free rate of return is: ?