Express the following Hindu-Arabic numeral as a Roman numeral.

$54$

Express the following Hindu-Arabic numeral as a Roman numeral.

$61$

Express $73$ as a Roman numeral. $\left(\mathrm{XXIIIC} / \mathrm{LXXIII} / \mathrm{LCIII}\right)$

Express $81$ as a Roman numeral.

Express $91$ as a Roman numeral.

Express $95$ as a Roman numeral.

Express $99$ as a Roman numeral.

Express $105$ as a Roman numeral.

Express $114$ as a Roman numeral.