$4.$ Which is a better investment, an account paying $($i$)5\mathrm{.}00\%,$ annual compounding, $($ii$)4\mathrm{.}95\%,$ quarterly compounding, $($iii$)4\mathrm{.}90\%,$ monthly compounding, $($iv$)4\mathrm{.}85\%,$ continuous compounding? $(4$ points$)$