You observe the following spot rates: Maturity Spot rate 1 year y1=5% 2 year y2=4.5% 3 year y3=4% 4 year y4=5.5% 5 year y5=4% Under the pure expectations theory, what is the expected future 2-year spot interest rate 3 years from now, 3r5? 5.5% 4.5% 5% 4%