Pakistan Telecommunication Limited (PTCL) has the following capital structure, which it considers to be optimal: PTCL has only long-term debt = 40%, preferred stock = 5%, and common stock = 55%. PTCL's tax rate is 40%, and investors expect earnings and dividends to grow at a constant rate of 7.5% in the future. PTCL paid a dividend of Rs. 8.5 per share last year, and its stock currently sells at a price of Rs. 175 per share. Ten-year Treasury bonds yield (risk free rate) is 4.5%, the market risk premium is 4%, and PTCL's beta is 1.25.

The following terms would apply to new security offerings.

Preferred: New preferred stock could be sold to the public at a price of Rs.100 per share, with a dividend of Rs. 5. Flotation costs of Rs. 2 per share would be incurred.

Debt: Debt could be sold at an interest rate of 11.5%.

Required:

a)Calculate costs of debt

b)Calculate costs preferred stock

c)Calculate costs common stock

d)Calculate weighted average cost of capital