[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 1 0.4 2 $17,500 0.1 $6,000 0.2 $19,000 0.7 $23,000 $20,000 0.2 -$ 5,3561 $12,000 0.6 0.5 $24,600 0.3 $28,000