$2-2.$ A newly constructed power plant proposes to burn coal with a sulfur content of $($a$)1\mathrm{.}8,$

$($b$)2\mathrm{.}4,$ and $($c$)3\mathrm{.}0$ percent by weight. If the plant is to meet the NSPS $($Table $2-3)$ for

emissions from new plants, what percent $S{O}_2$ removal is required? The fuel heating val$-$

ue is $10,750Bt\frac{u}{l}b.$