MCQ on Lease Versus Buy

Sir I don't understand how they get C. (NB: 10yr Ann Factor is 6.145, 5yr Ann factor 3.791) A company is considering whether to buy or lease two assets. Asset 1 has a 10 year economic life with a zero residual value. It can be purchased for $80,000 payable immediately. Alternatively, it can be leased for 10 lease rentals of $12,000 per annum payable in advance. Asset 2 has a 5 year economic life. It can be purchased for $81,000 payable immediately and will have a residual value of $40,000 after 5 years. Alternatively, it can be leased for 5 lease rentals of $14,000 per annum payable annually in arrears and the asset will be handed back to the lessor at the end of this 5 year contract. The required rate of return is 10% per annum. Ignore taxation. How should the company finance each asset? A. Lease-A1, A2 B. Lease A1. Buy A2 C .Buy A1, Lease A2 D. Buy A1. A2