a$.$ If the MARR is $12\%,$ use incremental ROR analysis to select the one economically best alternative given below $($A$,$ B$,$ C or D$).$ In the ROR analysis, use only present value analysis to compare alternatives $($In order to calculate IRR, use present value analysis formulas$).$CInitial Cost, $Annual Cash Flow $+50,000$Life, years$-200,000-$ XY$*1000-270,000-$ XY$*1000-270,000-$ XY$*1000-350,000+55,000+20,000303030$D$+70,00030$