Question $9(4$ points$)$

$11$C: If an investor invests half her funds in the riskless asset and half in MBI Inc. which has a beta of $0\mathrm{.}8$ then what beta does her portfolio have?

$0\mathrm{.}8$

cannot tell with this information

$1\mathrm{.}2$

$0\mathrm{.}4$