The numbers provided are in millions of dollars and reflect market values:

Cash $20$ Deposits historical avg. maturity $=4$ years; historical average duration $=3\mathrm{.}5$ years $200$

T$-$Bills $30$ days $(4\mathrm{.}5$ percent, par$)50$ Certificates of Deposit avg. maturity $=6$ months; avg. duration $=6$ months $150$

T$-$Bills $91$ days $(5\mathrm{.}0$ percent, par$)60$ Short$-$term Debt avg. maturity $=4$ years $150$

Commercial Loans avg. maturity $=9\mathrm{.}0$ years; avg. duration $=7\mathrm{.}5$ years $300$ Long$-$term debt avg. maturity $=15$ years; average duration $=12$ years $200$

Consumer Loans avg. maturity $=6\mathrm{.}0$ years; avg. duration $=4\mathrm{.}0$ years $200$ Equity $130$

Mortgage Loans $$ Fixed rate avg. maturity $=30$ years; avg. duration $=25$ years $150$

Mortgage Loans $$ Adjustable avg. maturity $=30$ years; interest rate reset $=6$ months $50$

Total Assets: $830$ Total Liabilities & Equity: $830$

What is the weighted average duration of the assets of the FI$?$

Group of answer choices

$7\mathrm{.}75$ years.

$8\mathrm{.}75$ years.

$7\mathrm{.}25$ years.

$9\mathrm{.}25$ years.

$8\mathrm{.}25$ years.