$1)$How much profit does a company $($which has a total of $$5$ million invested by its owners and $$4$ million in liabilities$)$ need to make in order to have an assets$-$to$-$liabilities ratio of $2$:$1?$

A$)$ $$2$ million

B$)$ $$3$ million

C$)$ $$5$ million

D$)$ $$7$ million

E$)$ $$8$ million

Answer is option D$,7$ miilion, Please explain why,Thank you.