Plutonic Corporation has a debt ratio of $30\%,$ a cost of debt $($Rd $)$ of $6\mathrm{.}00\%,$ and an equity beta $($B$)$ of $1\mathrm{.}38.$ Assuming a corporate tax rate $($Rt$)$ of $35\%,$ a risk$-$free rate $($Rf$)$ of $4\mathrm{.}5\%,$ and an EMRP of $5\mathrm{.}0\%,$ what is Plutonic$$s Unlevered Cost of Capital $($Ru$)?$ What is Plutonic$$s WACC? What is the upside limit of Plutonic$$s WACC? Please provide a specific figure.