WACC and unlevered beta

I’m working on this practice question.

Allen Udell, an analyst, is estimating WACC for Sunrise Industries S.A., a company that is based in Europe and can borrow at 12-month Euribor. Udell has collected the following information about the company.

The current 12-month Euribor is 3.5%. The market risk premium is 4%, and unlevered beta is 0.8. The risk-free rate is 2.5%. The company’s tax rate is 35%.

The WACC for debt-to-capital ratio of 0.45 is closest to A. 4.5% B. 5.0% C. 5.5%

Am I solving this correctly? I first need to lever beta, correct?

BL = (1+(1-.35)*(.45/.55)) = 1.2255

Then E(Ri)=.025+1.2255*.04=.074

WACC=.45*.035*(1-.35)+.55*.074=.0509 so B. Is that the correct process?

Yes, you are right

I did it like this, but it is the exact same this as what you did…

D/D+E = 0.45 … so E/D+E = 0.55 … 1/.55 = 1.818 * 0.45 = 0.818 … etc…