Show your complete iterative solution procedure and include appropriate cash flow diagram

A certain entrepreneur opened a fashion boutique which experienced the cash flows shown in the table below. She closed the boutique after four years due to falling revenues. (a) How many possible rates of return are there for these cash flows? (b) Find all the actual rate of return values between 0% and 100%. (c) If the entrepreneurs minimum acceptable rate of return is 20% per year, was this a good investment? Year Costs (S) Revenues (S) 0 75,000 149,500 267,500 90,000 45,000 42,000 210,000 57.000 60,000