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[15 marks] The tree diagram describes the uncertain cash flows for an engineering project. The analysis period is two years, and the MARR = 12% per year. Based on this information, find: a. E(PW)? b. V(PW)? c. SD(PW)? Time Period 0 2 $17,500 0.1 $6.000 0.2 $19,000 0.7 $23,000 0.4 $20.000 -$ 5,3561 0.2 $12,000 0.6 0.5 $24,600 0.3 $28,000