Ray L. answered 12/06/23
Investment Banker with passion for history and finance
You can use the Capital Asset Pricing Model (CAPM) formula to solve for this
CAPM = Risk-Free Rate + Beta * (Market Risk Premium)
Market risk premium = Expected Return - Risk-Free Rate
The prompt gives you the expected return for Amazon, it's 12.65%, it also gives you the risk free rate, its 5.5% being the 10-year US treasury security yield mentioned in the prompt. In most cases the 10-year US T-bill is always used to serve as the risk free rate.
12.65% - 5.5% = 7.15%
I don't see the correct response listed, it's only asking to solve for the market risk premium, so the beta is not needed for this calculation.