Answer:
2.3%
Step-by-step explanation:
If nominal interest rate (10-year Treasury bond rate) = real risk free interest rate + inflation premium + default risk premium + maturity risk premium + liquidity risk premium
Then real risk free interest rate = nominal interest rate - inflation premium - default risk premium - maturity risk premium - liquidity risk premium
real risk free interest rate = 5.3% - 2.8% - 0% - 0.2% - 0% = 2.3%