In the development of a publicly owned, commercial waterfront area, three possible independent plans are being considered. Their costs and

estimated benefits are given in the table to the right.

a$.$ Which plan$($s$)$ should be adopted, if any, if the controlling board wishes to invest any amount required, provided that the B$-$C ratio on the

required investment is at least $1\mathrm{.}0?$

b$.$ Suppose that $15\%$ of the costs of each plan are reclassified as disbenefits. What percentage change in the B$-$C ratio of each plan results from

the reclassification?

c$.$ Comment on why the rank$-$orderings in $($a$)$ are unaffected by the change in $($b$).$

a$.$ Perform the B$-$C analysis. Fill$-$in the table below. $($Round to four decimal places.$)$