need help asap

A preferred stock of a company is paying 4.5% dividend on par value ($25 Par), and can be sold to net $20 per share. The corporate tax rate is 25%.

A). what is the cost of preferred stock to this company? Before tax

B). what is the cost of preferred stock to this company? After tax

A preferred stock of a company is paying 4.5% dividend on par value (\$25 Par), and can be sold to net $20 per share. The corporate tax rate is 25%. What is the cost of preferred stock to this company? Before tax What is the cost of preferred stock to this company after tax