The apartment unit, From market evidence, there is a chance of 25% that ATCF will be $20,000. However, due to the variance of operating cost he also estimates there are a chance of 30% that ATCF will be $22,000, a chance of 20% that ATCF will be $12.000 and a chance of 25% that ATCF will be 52.000 accordingly.

a) what is the expected ATCF for this investment

b) what is the risk of this investment ?

c) what is the chance that the ATCF of apartment unit will be differ from expectation?