Giant enterprises stock has a required return of $12\mathrm{.}6\%.$ The company which plans to pay a dividend of $$2\mathrm{.}61$ per share in the coming year, anticipate that its future dividends will increase at an annual rate consistent with that experienced over the $2016-2022$ period, when the following dividends were paid. $2022=2\mathrm{.}442021=2\mathrm{.}282020=2\mathrm{.}132019=1\mathrm{.}992018=1\mathrm{.}862017=1\mathrm{.}742016=1\mathrm{.}631\mathrm{.}34$ A$)$ If the risk$-$free rate is $4\%,$ what is the risk premium on Giant's stock? B$)$ Using the constant$-$growth model, estimate the value of Giant's stock. C$)$ Expain what effect, if any, a decrease in the risk premium would have on the value of Giant's stock.