please answer both questions thank you

4. Estimating the DCF Growth Rate (1.02) Suppose Whitney Ltd, just issued a dividend or $2.08 per share on its common stock. The company paid dividends of $1.71,$1.82,$1.93, and $1.99 per share in the last four years. If the stock currently sells for $45, what is your best estimate of the company's cost of equity capital using the arithmetic average growth rate in dividends? What if you use the geometric average growth rate? 5. Calculating Cost of Preferred Stock (LO2) Coaldale Bank has an issue of preferred stock with a $3.75 stated dividend that just sold for $87 per share. What is the bank's cost of peferred stock