βl- Levered beta
βl=β∗(1+(1−Tax)∗ED)=1.5∗(1+0.72∗0.5)=2.04
С-Cost of Equity
С=0.07+2.04∗0.06=0.1924=19.24%
debt=5000∗(1+0.1924−0.1)=5462
ED=100005462=0.5462
if the debt option was chosen D/E would be 0.5462
ROE=net incom/equity=10000(1000−(5000∗0.05))∗0.72=0.054=5.4%
If the debt option was chosen ROE would be:
ROE=100001000−462)∗0.72=0.038736=3.8736%
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