Answer:
c. 9.21%
Step-by-step explanation:
In this question, we apply the Capital Asset Pricing Model (CAPM) formula which is shown below
Expected rate of return = Risk-free rate of return + Beta × (Market rate of return - Risk-free rate of return)
For stock A
12% = 4.75% + 1.30 × market risk premium
12% - 4.75% = 1.30 × market risk premium
7.25% = 1.30 × market risk premium
So, the market risk premium = 5.58%
For Stock B, required rate of return would be
= 4.75% + 0.80 × 5.58%
= 4.75% + 4.464%
= 9.214%