Can i please have some help with this question?

A law firm is expanding rapidly and must move to new office space. Business is good, and the firm is encouraged to purchase an entire building for 10 million. The building offers first-class office space, is conveniently located near their most important corporate clients, and provides space for future expansion. The firm is considering how to pay for it. David Rooney, a consultant, encourages the firm not to buy the building but to sign a long- term lease instead. "With lease financing, you'll save 10 million. You won't have to put up any equity investment," Rooney explains. The senior law partner asks about the terms of the lease. "I've already checked that," Rooney says. "The lease will provide 100% financing. It will commit you to 20 fixed annual payments of 950,000, with the first payment due immediately." "The initial payment of 950,000 sounds like a down payment to me," the senior partner observes sourly. "Good point," Rooney says amiably, "but you'll still save 9,050,000 up front. You can earn a good rate of return on that money. For example, I understand you are considering branch offices in London and Beijing. The 9 million would pay the costs of setting up the new offices, and the cash flows from the new offices should more than cover the lease payments. And there is no financial riskthe cash flows from the expansion will cover the lease payments with a safety cushion. There is no reason for you or your partners to worry or to demand a higher-than-normal rate of return."

Requirement: Suppose the present value of the building equals its purchase price of 10 million. Assume that the law firm can finance the offices in London and Beijing from operating cash flow, with cash left over used for the lease payments. The firm will not default on the lease payments. For simplicity, you may ignore taxes.

(a)If the law firm takes the lease, it will invest 950,000 and in effect borrow 9,050,000, repaid by 19 instalments of 950,000. What is the interest rate on this disguised loan? [20 marks]

(b)The law firm could finance 80% of the purchase price with a conventional mortgage at a 7% interest rate. Is the conventional mortgage better than the lease? Provide supporting calculations and discussion. [20 marks]

(c)Construct a simple numerical example to convince Rooney that the lease would expose the law firm to financial risk. You may wish to consider what is the rate of return on the firm's equity investment in the office building if a recession arrives and the market value of the (leased) office building falls to 9 million after one year?; what is the rate of return with conventional mortgage financing?; with all-equity financing? [15 marks]

(d)Do the investments in London and Beijing have anything to do with the decision to finance the office building? Explain briefly. [10 marks]

(I know how to do question A and B, however I am stuck on C. I'm not sure how to generate the Interest Rate of return for question C?)

• Hope you can help