Answer:
The market expect the one-year Treasury rate to be four years from today, E(5r1) to be 8.379%
Explanation:
1 + 1R5 = [(1 + 1R4)^4(1 + E(5r1))]1/5
1.0615 = [(1.056)^4(1 + E(5r1))]1/5
(1.0615)5 = (1.0456)^4(1 + E(5r1))
1 + E(5r1) = (1.0615)5/(1.0456)^4
E(5r1) = 8.379%
Therefore, The market expect the one-year Treasury rate to be four years from today, E(5r1) to be 8.379%