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A manager is trying to decide whether to buy one machine or two If only one is purchased and demand proves to be excessive, the second machine can be purchased later. Some saleswill be lost. however, because the lead time for produbing this type of machine is six months. In addbon, the cost per machine wili be lower if both ase purchased at the same time. The probabilty of low demand is estimated to be 0.20 . The after-tax net present value of the benefits trom purchasing the two machines together is $70,000 if demand is low and $190,000 ir demand is high. It one machine is purchased and demand is low, the net present value is $100,000. If demand is high, the manager has three options. Doing nothing has a net present value of $100,000, stbcomtracting, $160.000, and buying the second machine, $130,000. a. Choose the correct docision tree for this problem. Note that each payef is given in thousands of dollars. b. How many machines should the company buy initially? What is the expected payoff for this alternative? Best decision is to buy machine(s) and its expected payoff is $ (Enter your responses as integers.) 6ime study of an employee assembling peanut vaves resulted in the following set of observations. What is the standard time, given a performance rating of 94 percent and an allowance of 20 ercent of the total normal time? The standard time is seconds. (Enter your response roundod to fwo decimal places.) The time per unit customer served is minutes. (Enter your response rounded to two decimal places) Plastomer, Inc- specalces in the manufacture of high-grade plastic fim used to wrap food products. Fimm is rejected and scrapped for a variety of teasons (e.9- cpacity, high carbon content. incorrect thickness or gauge, scratches, and so on). Durng the past month, management collected data on the bpes of rejects and the amount of scrap goneratod by each type. The resuls are gven in the folowing table. Compute percent of total amount for each type of falure to complete the table. (Enter your responses as percents roundod to one decimal pisce.)