A small high-speed commercial centrifuge has the following net cash flows and abandonment values over its useful life. The firm's MARR is 9% per year Determine the optimal time for the centrifuge to be abandoned if its current MV is $8,000 and it won't be used for more than five years End of Year 3 $1,500 $4,000 2 Annual revenues less expenses $1,500 $1,500 Abandonment value of machine 56.300 5,300 "Estimated MV Click the icon to view the interest and annuity table for discrete compounding when MARR 4 $1,500 $2.200 5 $1,500 9% per year The centrifuge should be retained for immediately year(s) before abandonment. (Round to the nearest whole number Type of the centrifuge should be abandoned