find the expected return for investing in buildings in a metro area where the following three buildings are for sale:

(Explain How to get the values of probability)

The cost of the building is $3 million, the total rents are $800,000 and the total expenses are $500,000.

The cost of the building is $102 million, the total rents are $34 million and the total expenses are $31 million.

The cost of the building is $16 million, the total rents are $8 million and the total expenses are $6 million.

what would you expect is the cost of a building in that metro area if its rents are $4 million and the total expense are $3 million.

what would you expect is the net profit per year would be if a building in that metro area cost $50 million.