An analyst gathers the following comp set consisting of Firm A and Firm B$.$

Estimated debt beta for each firm equals $0\mathrm{.}2.$

Firm A: CAPM beta $=0\mathrm{.}8$; debt$-$to$-$equity ratio $=0\mathrm{.}5$

Firm B: CAPM beta $=1\mathrm{.}4$; debt$-$to$-$equity ratio $=2\mathrm{.}5$

All debt is perpetual, no new issuances or debt retirements are planned.

a$.$ Using the information to compute the industry unlevered beta.

b$.$Find WACC for a similar firm C with debt$-$to$-$equity ratio of $1?$