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4. Sam started small business, she invested $142,000 and after a year her average income per month was $3,500. She is a bit disappointed and thinks that if she invests in a new marketing campaign her income will be $7,400 on the other end if her customers do not like her marketing campaign her monthly income could decrease by 15%. Determine the PW expected value, using a 12% yearly interest rate. Consider the most likely duration for the project 5 years with an optimistic duration of 25% more time and with a pessimistic duration of 10% less time. Hint use a beta approximation. 4. Sam started small business, she invested $142,000 and after a year her average income per month was $3,500. She is a bit disappointed and thinks that if she invests in a new marketing campaign her income will be $7,400 on the other end if her customers do not like her marketing campaign her monthly income could decrease by 15%. Determine the PW expected value, using a 12% yearly interest rate. Consider the most likely duration for the project 5 years with an optimistic duration of 25% more time and with a pessimistic duration of 10% less time. Hint use a beta approximation