How would I solve this problem?

Problem #1 Imagine that in a given point in time we observe the following yields to maturity i175 = 1%, 'igt = 2%, 3: = 3%, and Lu 2 4%. Furthermore, assume that in this economy investors View a sequence of one period bonds as a perfect substitute for a. long term bond. i) What is the expected short term interest rate two periods from period t