Variance $-$ Covariance Matrix

Based on the two tables and the graph above, if you would like your final combination portfolio to

have St$.$ Dev. of about $2\mathrm{.}8\%,$ how should you split your money between ORP and Rf securities$?$

A$.0\mathrm{.}9018$ and $0\mathrm{.}0982$

B$.0\mathrm{.}1088$ and $0\mathrm{.}8911$

C$.0\mathrm{.}7500$ and $0\mathrm{.}2500$

D$.0\mathrm{.}6349$ and $0\mathrm{.}3651$

Based on the two tables and the graph above, if you would like your final combination portfolio to

have an Expected Return of $0\mathrm{.}5\%,$ how should you split your money between ORP and Rf securities$?$

A$.0\mathrm{.}9018$ and $0\mathrm{.}0982$

B$.0\mathrm{.}1088$ and $0\mathrm{.}8911$

C$.0\mathrm{.}7500$ and $0\mathrm{.}2500$

D$.0\mathrm{.}6349$ and $0\mathrm{.}3651$