please show all steps and explain to me how to solve A, B and C. do not use excel. thank you

3.8 Wilson Pharmaceutical is planning a $ 100 million for development of a new cancer drug . The development will be financed with a combination of debt, preferred equity and common equity. The firm's current capital structure, which it considers to be optimal, consists of 30% debt, 20% preferred equity and 50% common equity , The firm can issue bond with the cast of 12% before tax , The investment banker informed wilson that it could issue a $100 par value , preferred stock that would provide investors with a $ 14 annual dividend . The investment banker expects to accecagecomnow equip sell the issue at its par value and will charge a 5% commission fee , Wilson expects to use any common equity needed to finance the expansion through issuing new common stock to the public . Wilson expects the net proceeds from the sale of the common stock to the public , wilson expects the net proceeds from the sale of the common stock to be $ 30 per share , The firm currently pays a dividend of $3.50 per share and expects its earnings and dividends to grow at a $1090 annual rate for the foreseeable future . The firm's marginal tax rate is 40 . @ Calculate wilson's cost of preferred stock b) Calculate Wilson's cost of external equity 9) Calculate Wilson's weighted average cost of capital