On March 11, 20XX, the existing or current (spot) 1-, 2-, 3-, and 4-year zero-coupon Treasury security

Question:

On March 11, 20XX, the existing or current (spot) 1-, 2-, 3-, and 4-year zero-coupon Treasury security rates were as follows:
1R1 = 0.75%,
1R2 = 1.35%,
1R3 = 1.75%,
1R4 = 1.90%
Using the unbiased expectations theory, calculate the 1-year forward rates on zero Treasury bonds for years 2, 3, and 4 as of March 11, 20XX.

Coupon
A coupon or coupon payment is the annual interest rate paid on a bond, expressed as a percentage of the face value and paid from issue date until maturity. Coupons are usually referred to in terms of the coupon rate (the sum of coupons paid in a...