By using the reverse-engineering principle, the following calculation and explain in the detail on the possible assessment and decision making made. Your answer must be based from the perspective of Engineering Economics and justification is needed for each points made. Provide five (5) points with justifications. PWA =-[C(A/P,10%,0)](P/A,10%,0) -[C(A/P,10%,3,6,9,12)](P/A,10%,3,6,9,12) -[X(A/P,10%,0)](P/A,10%,0) -[X(A/P,10%,3,6,9,12)](P/A,10%,3,6,9,12) +4D +E -G(P/A,10%,15) -H(P/F,10%,2.5,5.5,8.5,11.5,14.5) -4J PWB -[CA/P,10%,0](P/A,10%,0) -[C(A/P,10%,5,10)](P/A,10%,5,10) -[X(A/P,10%,0)](P/A,10%,0) -[X(A/P,10%,5,10)](P/A,10%,5,10) +2M +E -Q(P/A,10%,15) -H(P/F,10%,2.5,5.5,8.5,11.5,14.5) -3J -W(P/F,10%,3.5,8.5,13.5)