a$)$Provide an elementary explanation of why certain projects are successful in meeting the three$-$dimensional goal while others fail to meet this goal.b$)$Describe the multi$-$disciplinary nature of projects and the consequences thereof.c$)$Explain how excellent project managers and project teams spend their time.d$)$Explain the benefits and challenges of project management.e$)$Explain how commitments differ from goals and from estimates.