Alexander Graham Bell invented the telephone in $1876$. How many years ago was that, if this is the year $2004$.

Convert $12-$hour format to $24-$hour format.

$8$ a.m.

Convert $12-$hour format to $24-$hour format.

$11:00$$\mathrm{a}.\mathrm{m}.$

Convert $12-$hour format to $24-$hour format.

$12:00$ noon

Convert $12-$hour format to $24-$hour format.

$1:00$ $\mathrm{p}.\mathrm{m}.$

Convert $12-$hour format to $24-$hour format.

$2:00$ $\mathrm{p}.\mathrm{m}.$

Convert $12-$hour format to $24-$hour format.

$3:00$$\mathrm{p}.\mathrm{m}.$

Convert $12-$hour format to $24-$hour format.

$4:00$$\mathrm{p}.\mathrm{m}.$

Convert $12-$hour format to $24-$hour format.

$5:00$ $\mathrm{p}.\mathrm{m}.$