The porsche shop, founded in 1985 by dale jensen, specializes in the restoration of vintage porsche automobiles. one of jensen's regular customers asked him to prepare an estimate for the restoration of a 1964 model 356sc porsche. to estimate the time and cost to perform such a restoration, jensen broke the restoration process into four separate activities: disassembly and initial preparation work (a), body restoration (b), engine restoration (c),and final assembly (d). once activity a has been completed, activities b and c can be performed independently of each other; however, activity d can be started only if both activities b and c have been completed. based on his inspection of the car, jensen believes that the following time estimates (in days) are applicable: jensen estimates that the parts needed to restore the body will cost 3000 and that the parts needed to restore the engine will cost 5000. his current labor costs are 400 a day. a. develop a project network. b. what is the expected project comletion time? c. jensen's business philosophy is based on making decisions using a best- and worst-case scenario. develop cost estimates for completing the restoration based on both a best- and worst-case analysis. assume that the total restoration cast is the sum of the labor cost plus the material cost. d. if jensen obtains the job with a bid that is based on the costs associated with an expected completion time, what is the probability that he will lose money on the job? e. if jensen obtains the job based on a bid of 16,800, what is the probability that he will lose money on the job?

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of the three mortgage options that demarco and tanya have to choose from, the balloon payment mortgage would be their best option, over adjustable payment and fixed payment plans.ultimately, the balloon payment plan would save demarco and tanya overall, in interest, would cost less monthly, and they would only have to make these payments for 8 years, opposing to 30 years for adjustable or fixed payment plans. 

overall, demarco and tanya would save $80,811 if they chose balloon payments over fixed payments, and would save $116,711 if they choose balloon payments over adjustable payments. benefits with choosing fixed payments over adjustable payments is that, in the end, the payments will still be $836.30 a month, while with adjustable payments, the initial monthly payments will be $763.38 to $1082.70 a month, ultimately leading to a more costly purchase. benefits with choosing fixed payments over balloon payments are not present. benefits in choosing adjustable payments over is that it has a lower interest rate, and starts with lower monthly payments initially. benefits in choosing adjustable payments over balloon payments include a lower interest rate, and lower initial monthly payments. benefits in choosing balloon payments over fixed payments include lower interest rates, lower overall price, lower monthly payments, takes less time to pay off, and does not require a downpayment. benefits in choosing balloon payments over adjustable payments include, lower monthly payments (when averaged), takes less time to pay off, and lower overall price.

hence, option c, balloon payments, is the best option for demarco and tanya to make this purchase, for it will save them a minimum of $80811, and a maximum of $116,711.