Problem $16-20$ After$-$tax WACC Gaucho Services starts life with all$-$equity financing and a cost of equity of $15\%.$ Suppose it refinances to the following market$-$value capital structure: a$.$ Use MM$\text{'}$s proposition $2$ to calculate the new cost of equity. Gaucho pays taxes at a marginal rate of T$\_($c$)=35\%.$ b$.$ Calculate Gaucho's after$-$tax weighted$-$average cost of capital. Note: Do not round intermediate calculations. Enter your answers as a percent rounded to $2$ decimal places. Answer is not complete.