Examine the Securities Below and Identify the Security with the Highest

Examine the securities below and identify the security with the highest liquidity premium,the highest default risk premium,and the highest maturity premium.
a.30-year U.S.Government Treasury bond maturing in 2025
b.25-year Bbb-rated corporate bond maturing in 2030,actively traded on the New York Exchange
c.10-year Aaa-rated corporate bond maturing in 2020,thinly traded on a regional exchange
d.3-month U.S.Treasury bill