$10$

You find the following Treasury bond quotes: To calculate the number of years until maturity, assume that it is currently May $2022.$ All of the bonds have a par value of $$1,000$ and pay semiannual coupons.

$\backslash$table$[[$Maturity$,],[$Rate$,$Month$/$Year$,$Bid,Asked,Change,Ask Yield$],[??,$May $30,103\mathrm{.}4716,103\mathrm{.}5444,+\mathrm{.}3119,6\mathrm{.}159],[5\mathrm{.}624,$May $33,104\mathrm{.}5056,104\mathrm{.}6513,+\mathrm{.}4389,??$