Please provide explanation

Andrew has found a Treasury Bond futures contract whose underlying's duration is 8.5 years and is currently selling for $97,500. Interest rates are currently 8% and are expected to rise by 1.5%. What is the expected change in the future contract's price for this change in interest rates? $1462.50 $12,431.25 $11,521.42 $1462.50 $12,431.25