Miller Company's most recent contribution format income statement is shown below:TotalPer Unit$ $400,000$$ $20\mathrm{.}00$Sales $(20,000$ units$)240,00012\mathrm{.}00$Variable expenses$160,000$$ $8\mathrm{.}00$Contribution margin$80,000$Fixed expenses.$ $80,000$Net operating incomePrepare a new contribution format income statement under each of the following conditions $($consider each case independently$)$:a$.$ The number of units sold increases by $15\%.$b$.$ The selling price decreases by $$1\mathrm{.}50$ per unit, and the number of units sold increases by $25\%.$c$.$ The selling price increases by $$1\mathrm{.}50$ per unit, fixed expenses increase by $$20,000,$ and the number of units sold decreases by $5\%.$d$.$ The selling price increases by $12\%,$ variable expenses increase by $60$ cents per unit, and the number of units sold decreases by $10\%.$Which alternative will generate highest NOl