The following are earnings and dividend forecasts made at the end of 2020 for the IBM Corporation with a $40 BV per common share at that time. In 2021, EPS will be $7 and DPS $1. In 2022, EPS will be $8 and DPS $1.50. In 2023, EPS will be $9 and DPS $2. The firm has a required equity return of 15% per year. Forecast the return on common equity for the company for each year from 2013 to 2015, accordingly.