The current yield on Martin's Mills common stock is 3.6 percent. The company just paid a $1.80 dividend and plans to pay $1.86 next year.

The current yield on Martin's Mills common stock is 3.6 percent. The company just paid a $1.80 dividend and plans to pay $1.86 next year. The dividend growth rate is expected to remain constant at the current level. What is the required rate of return (%) on this stock?