Please show me the working as an original answer, I've seen two different answers and both were not the same.

(b) what is the discount rate given sources of financing? Hint: The discount rate should be the weighted average cost of capital.

(i) $200,000 from a 5-year fixed interest loan whose annual loan payments are $48,000.

(ii) $250,000 from a 5-year zero-coupon bond with a face value of $400,000.

(iii) $300,000 from an ordinary share issue where a dividend of $18,000 will be paid in one year and it is expected to grow at 3% per annum.

(iv) $250,000 from a 5-year coupon-paying bond issue whose coupon rate is 7% and face value is $300,000.