S$.$ Bouchard and Company hired you as a consultant to help estimate its cost of capital. You have obtained the following data: $D_0=$$$0\mathrm{.}85$;$P_0=$$$22\mathrm{.}00$; and $g=6\mathrm{.}00\%($constant$).$ The CEO thinks, however, that the stock price is temporarily depressed, and that it will soon rise to $$40\mathrm{.}00.$ Based on the DCF approach, by how much would the cost of equity from retained earnings change if the stock price changes as the CEO expects?