Answer:
a. True
Explanation:
from the CAPM formula we can derive the statemeent as true.
[tex]Ke= r_f + \beta (r_m-r_f)[/tex]
risk free = 0.05
market rate = 0.12
premium market = (market rate - risk free) 0.07
beta(non diversifiable risk) = 0
[tex]Ke= 0.05 + 0 (0.07)[/tex]
Ke 0.05000
As the beta multiplies the difference between the market rate and risk-free rate a beta of zero will nulify the second part of the equation leaving only the risk-free rate. This means the portfolio is not expose to volatility