Please help me with homework:

1) How does the IFRS criteria for accounting for a pension plan curtailment differ from the U.S. GAAP criteria? Please explain.

2) If a company has a revolving line of credit that they are actively using by borrowing money and making repayments during the year, under what circumstances would it be acceptable to report a net amount for the borrowing and repayment activity associated with the line of credit when preparing the Cash Flow Statement? Please explain.

3) Please explain how accountants are expected to address uncertainty in whether deferred tax assets can be used in the future affect income tax expense.