Answer:
the answer is 7%
Explanation:
If we estimate the beta as a proportion between the expected risk -free rate and the expected market value, we obtain 4%/16%=25%
b=0.25 r=?
r_m=0.16
r_ref=0.04
then we use the CAPM Model
r=r_ref +b(r_m-r_ref)
r= 0.04+0.25*(0.16-0.04)=0.07