1. AF reported past service cost (called prior service cost under U.S. GAAP) in its income statement as part of net periodic pension cost. Is that reporting method the same or different from the way we report prior service cost under U.S. GAAP? 2. Look at Note 30.2, Retirement Benefits. AF incorporates estimates regarding staff turnover, life expectancy, salary increase, retirement age, and discount rates. How did AF report changes in these assumptions? Is that reporting method the same or different from the way we report changes under U.S. GAAP? 3. AF does not report remeasurement gains and losses in its income statement. Where did AF report these amounts? Is that reporting method the same or different from the way we report pension expense under U.S. GAAP? 4. See Note 22. Did AF report (a) net interest cost or (b) net interest income in 2017?