You've collected the following information from your favorite financial website. According to your research, the growth rate in dividends for Manta Energy for the previous 10 years has been negative 10 percent. If investors feel this growth rate will continue, what is the required return for the stock? Note: A negotive answer should be indicated by a minus sign. Do not round intermediate calculations and enter your enswer os a percent rounded to 2 decimal places, e.9., 32.16