Solve for the unknown number of years in each of the following: $($Do not round intermediate calculations and round your answers to $2$ decimal places, e$.$g$.,32\mathrm{.}16.)$

$\backslash$table$[[$Present Value,Years,Interest Rate,,Value$],[610,,7\%,$$$,1,389],[940,,8\%,,1,821],[26,35,0,$L$,9\%,,289,715],[43,500,,11\%,+,430,258]]$