Need help with this finance problem. Thank you

AT (This information is used for problems 20 - 25) The Envelope Company has the following liabilities and equity The risk free rate of return is 3.0%. The market rate of return is 12.5%. The Beta is 1.2. The P/E ratio is 7.1. The stock price is $14.80. The last annual dividend was $0.60. This dividend is expected to grow 4.5% per year in the future. Envelope's tax rate is 35%. The interest rate is 2.75% on short term notes payable and 5.3% on long term bank financing. Calculate the rate of return on equity using the dividend growth model