$12-21.(2$ points$)$ In mid$-2015,$ Cisco Systems had a market capitalization of $$130$ billion. It had A$-$rated debt of $$25$ billion as well as cash and short$-$term investments of $$60$ billion, and its estimated equity beta at the time was $1\mathrm{.}11.$a$.$ What is Ciscos enterprise value?b$.$ Assuming Ciscos debt has a beta of zero, estimate the beta of Ciscos underlying business enterprise$\mathrm{.}12-26.(3$ points$)$ Unida Systems has $40$ million shares outstanding trading for $$10$ per share. In addition, Unida has $$100$ million in outstanding debt. Suppose Unidas equity cost of capital is $15\%,$ its debt cost of capital is $8\%,$ and the corporate tax rate is $40\%.$a$.$ What is Unidas unlevered cost of capital?b$.$ What is Unidas after$-$tax debt cost of capital?c$.$ What is Unidas weighted average cost of capital?$12-27.(2$ points$)$ You would like to estimate the weighted average cost of capital for a new airline business. Based on its industry asset beta, you have already estimated an unlevered cost of capital for the firm of $9\%.$ However, the new business will be $25\%$ debt financed, and you anticipate its debt cost of capital will be $6\%.$ If its corporate tax rate is $40\%,$ what is your estimate of its WACC?