Heston Corperation stock had a required rate of return of $12\mathrm{.}5\%$ last year, when risk free rate was $3\%$ and the market risk primium was $4\mathrm{.}75\%.$ Then an increase in investor risk adversion caused the market risk primium to rise by $2\%.$ The risk$-$free rate and the firms beta remain unchanged. What is the compnaies nwe required rate of retunr?