9. OM Construction Company must choose between two types of cranes that have identical capacity and do exactly the same job. Crane A costs $700,000, will last for two years, and will require $80,000 in maintenance each year. Crane B costs $800,000, will last for three years, and will require $35,000 in maintenance each year. Maintenance costs for cranes A and B occur at the end of each year. The appropriate discount rate is 10% per year. Which machine should OM