An all$-$equity company decides to recapitalize. The company plans to borrow with a $40\%$ debt to asset ratio with the interest rate of $4\%$ and use the funds raised to repurchase its own stocks. The company' current beta is $1\mathrm{.}5.$ Assume the risk$-$free rate is $5\%,$ the market risk premium is $6\%$ and the tax rate is $21\%.$ What is the current WACC of the company and the new WACC at $40\%$ debt respectively?