Which of the following is correct?

Under the direct method approach to cash flow statements, depreciation is:

Which statement is true?

The main difference between the current ratio and the quick ratio is that the quick ratio excludes:

A study found out that, on average, 10% of a pharmaceutical company's drugs that are placed on the market sell more than $500 million their first year. If a drug sells more than $500 million on its first year on the market, its probability of selling more than $500 million on the second year goes up to 90%. If on the other hand, the drug sells under $500 million during its first year on the market, its probability of selling more than $500 million the second year is only 30%. If a drug sold $750 million the second year after its launch, what is the probability that it sold more than $500 million the first year after its launch?