$7.$ AC Electric just paid its annual dividend of $ $2\mathrm{.}42($Do$).$ The firm plans to increase its dividend by $2\mathrm{.}5$ percent for the next $4$ years and then maintain a constant $2$ percent rate of dividend growth. The required return is $8$ percent. What is the current value per share of this stock $?$

Please show formula. No Excel Thank you