Currently, Meyers Manufacturing Enterprises $($MME$)$ has a capital structure consisting of $35\%$ debt and $65\%$ equity. MME's debt currently has a $6\mathrm{.}7\%$ yield to maturity. The risk$-$free rate $($rRF$)$ is $4\mathrm{.}7\%,$ and the market risk premium $($rM $$ rRF$)$ is $5\mathrm{.}7\%.$ Using the CAPM, MME estimates that its cost of equity is currently $10\mathrm{.}9\%.$ The company has a $25\%$ tax rate.

a$.$ What is MME's current WACC?