3. The following data have been obtained. First Cost Probability ATCF Probability Salvage Probability so $15,000 6 $40,000 $60,000 $75,000 .25 .50 .25 $10,000 1.00 .2 $30,000 The life is 7 years, and MARR is 15%. a. Calculate the expected present worth. b. Calculate the probability of earning 15%. c. Describe in detail how you would use Crystal Ball to solve this problem, Include a shetch of thic forecast cell, and describe what it tells you ourput