$7\mathrm{.}12.$ Companies A and B face the following interest rates $($adjusted for the differential impact

$\backslash$table$[[$of taxes$)$:$,$Company $A,$Company B$],[$U$.$S$.$ dollars $($floating rate$),$LIBOR $+0\mathrm{.}5\%,$LIBOR $+1\mathrm{.}0\%$