Suppose oil forward prices for $1-$year, $2-$year, and $3-$year delivery are $$75,$ $$70,$ and $$65.$ The $1-$year, $2-$year, and $3-$year interest rates are $5\%($i$.$e$.,$ the yield curve is flat.$)$

What is the $3-$year swap price per barrel of oil?If you are the swap dealer offering the $3-$year swap contract with the swap price from $($a$),$ how could you hedge your position using forward contracts?What would be the overpayments and$/$or underpayments in each year from your hedge in $($b$)?$