Unida Systems has $44$ million shares outstanding trading for $ $12$ per share. In$$ addition, Unida has $ $99$ million in outstanding debt. Suppose$$ Unida's equity cost of capital is $14\%,$ its debt cost of capital is $7\%,$ and the corporate tax rate is $39\%.$

a$.$ What is$$ Unida's unlevered cost of$$ capital?

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

c$.$ What is$$ Unida's weighted average cost of$$ capital?