The Wellington Co. likes to use the dividend discount model to estimate its cost of equity. What should that be (in percent to two places) if their stock today is $54 and with a constant dividend...

The Wellington Co. likes to use the dividend discount model to estimate its cost of equity.  What should that be (in percent to two places) if their stock today is $54 and with a constant dividend growth of 3% their next dividend is estimated to be $0.91?

Urgent please help