Years to maturity. How long is it to maturity for the following bonds,

Data table

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$\backslash$table$[[$Par Value,$\backslash$table$[[$Coupon$],[$Rate$]],\backslash$table$[[$Years to$],[$Maturity$]],\backslash$table$[[$Yield to$],[$Maturity$]],$Price,$\backslash$table$[[$Coupon$],[$Frequency$]]],[$$$5,000\mathrm{.}00,5\%,?,7\%,$$$4,579\mathrm{.}15,$monthly$],[$$$1,000\mathrm{.}00,6\%,?,12\%,$$$779\mathrm{.}20,$semiannual$],[$$$1,000\mathrm{.}00,8\%,?,11\%,$$$758\mathrm{.}40,$quarterly$],[$$$1,000\mathrm{.}00,10\%,?,8\%,$$$1,079\mathrm{.}85,$annual$]]$