Tom is managing a $$10$ million portfolio that has a beta of $1\mathrm{.}25$ and a required rate of return of $12\mathrm{.}6\%.$ The current risk$-$free rate is $4\mathrm{.}7\%.$ Assume that Tom receives another $$2$ million. If Tom invests the money in a stock with a beta of $0\mathrm{.}85,$ what will be the required return on Tom$$s $12$ million portfolio?