true or false please answer all and briefly state if true or false

1. The full-disclosure principle requires a complete set of financial statements supported by notes to those statements.

2. The effective interest rate method to amortize bond discount or premium is not mandatory under IFRS.

3. An increase in selling price of goods to customers in itself will result in an increase in gross profit percentage.

4. Last-in first-out is an acceptable inventory costing method under IFRS.

5. Ownership of goods passes from the seller to the buyer after the buyer has paid for the goods.

6. An incorrect valuation of ending inventory at the end of a fiscal year affects only the balance sheet and does not affect the income statement.