The payoff from a derivative will occur in 8 years. It will equal the average of the 1 -year risk-free interest rates observed at times $5,6,7$, and 8 years applied to a principal of $$\$ 1,000$$. The risk-free yield curve is flat at $6 \%$ with annual compounding and the volatilities of all rates are $16 \%$. Assume perfect correlation between all rates. What is the value of the derivative?