The following information are provided to you

Tax rate = 21%.

11-year, 10% coupon, semiannual payment noncallable bonds sell for $1,150.00. New bonds will be privately placed with no flotation cost.

8%, $100 par value, quarterly dividend, perpetual preferred stock sells for $120.00.

Common stock sells for $40. D₀ = $4.20 and g = 4.5%.

b = 1.2; r_RF = 7%; RPM = 5.5%.

Bond-Yield Risk Premium = 4%.

Calculate the cost of debt (both pre-tax and after-tax cost of debt), cost of equity, and cost of preferred stock