Liquidity Premium HypothesisBased on economists' forecasts and analysis, one-year Treasury bill rates and liquidity premiums for the next four years are expected to be as follows:

R₁=5.95%E(r₂) = 7.05%L₂= .75%E(r₃) = 7.25%L₃= .78%E(r₄) = 7.45%L₄= .80%

Using the liquidity premium hypothesis, what is the current rate on a four-year Treasury security?

Please explain