The real risk-free rate of interest is 2.36% at the beginning of 2021. Inflation is expected to be 2% in 2021, jump to 4.00% in 2022, and run at 3% in 2023. A maturity risk premium is expected to be 0.16% per year to maturity. A liquidity premium on corporate bonds issued by small companies will continue to be 0.50%, regardless of their maturities. What should the interest rate on a 3-year Treasury security be at the beginning of 2021?