Also do cash flow diagram

2.57 An A&E firm is considering purchasing the building it currently occupies under a long- term lease because the owner of the build- ing suddenly put it up for sale. The building is being offered at a price of $170,000. Since the lease is already paid for this year, the next annual lease payment of $30,000 isn't due until the end of this year. Because the A&E firm has been a good tenant, the owner has offered to sell to them for $160,000. If the firm purchases the build- ing with no down payment, how long will it be before the company recovers its invest- ment at an interest rate of 12% per year