1. ) A company wants to purchase a new machine. There two options Machine A and Machine B. The first costs of A and B are $9000 and $11,000 respectively. Machine A has net annual benefits of $1800 for the first year and will increase by $150 every year during its five year useful life, and the salvage value is $600. Machine B has net annual benefits of $3200 but will decrease by $150 every year during during each year of its four year useful life, and the salvage value is $1500. If the MARR is 12%, which machine should be selected?