Delta has both equity and debt used to finance itself. Delta's Beta has been calculated as $1\mathrm{.}5.$ The average return of the market has been $13\%$ and the risk$-$free rate is $1\%.$ Delta also has a $30-$year fixed coupon bond with $10$ years 'til maturity with a $6\%$ coupon rate paid annually. This bond is currently trading at $$964\mathrm{.}06.$ The risk premium for Delta's bond is $\_\_\_\_\_\_\_\_\_\_\%$