The Wall Street Journal reported the rate on one-year Treasury-bill in year 2020 is 3.15 percent and the expected one-year rate in 2021 is 4.25 percent. According to the expectations theory, what should be the current rate on two-year Treasury security over 2020 to 2021? 4.74 percent 5.50 percent 3.70 percent 2.36 percent 4.15 percent