$8\mathrm{.}25$ A solid$-$waste recycling plant is considering two types of storage bins using an MARR of $10\%$ per year. $($a$)$ Use ROR evaluation to determine which should be selected. $($b$)$ Confirm the selection using the regular AW method at MARR $=10\%$ per year. P Q $-35,000$ Storage Bin First cost, $ AOC, $ per year Salvage value, $ $-18,000-4000-360010002700$ Life, years $36$