Unida Systems has $32$ million shares outstanding trading for $$$$12$ per share. In$$ addition, Unida has $$$$97$ million in outstanding debt. Suppose Unida$\text{'}$s equity cost of capital is $12\%,$ its debt cost of capital is $9\%,$ and the corporate tax rate is $28\%.$

a$.$ What is Unida$\text{'}$s unlevered cost of$$ capital?

b$.$ What is Unida$\text{'}$s $$after$-$tax debt cost of$$ capital?

c$.$ What is Unida$\text{'}$s weighted average cost of$$ capital?