1.(30)Inthepast,theAframFoundationhasawardedmanygrantstoimprovethelivingandmedicalconditionsofpeopleinwar-tornandpoverty-strickencountriesthroughouttheworld.Inaproposalforthefoundation'sboardofdirectorstoconstructanewhospitalandmedicalcliniccomplexinadeprivedcentralAfricancountry,theprojectmanagerhasdevelopedsomeestimates.Thesearedeveloped,soshestates,inamannerthatdoesnothaveamajornegativeeffectonprimeagriculturallandorlivingareasforcitizens.Thefoundation'sdiscountrateis5.5%peryear.

-Investment(Award)amount:$18million(endof)firstyear,decreasingby$3millionperyearfor3additionalyears,andnomoreinvestmentsafterwards.

-Annualcosts:$2.5millionperyearfor10years,asproposed

-Benefits:Reductionof$9.0millionperyearinhealth-relatedexpensesforcitizens

-Disbenefits:$0.6millionperyearforremovalofarablelandandcommercialdistricts

(a)(15)UsetheconventionalandmodifiedB/Cmethodstodetermineifthisgrantproposaliseconomicallyjustifiedovera10-yearstudyperiod.

(b)(15)Howmuchannualcostsshouldbereducedatleasttojustifythisgrantinthemodifiedmethod?

(please show me the solving process either)