NEED ANSWER QUICK! (sorry super important)

1. The percentage of a fixed cost over its revenues remains the same if the revenues remain the same. True or False?

2. The amounts ($) of fixed costs vary as revenues change. True or False?

3. The percentage (%) of a fixed cost over its revenues remains the same as the revenues change. True or False?

4. It's been noticed that the percentage (%) of a certain cost over revenues has declined over time as the revenues amount has grown. It can be concluded that this cost is a fixed cost. True or False?

5. If the dollar amount of a cost changes in the same direction as the changes of the revenues (over time), the cost is a fixed cost. True or False?

6. If the percentage (%) of a cost over time has remained at 15% of its revenues, the cost is a variable cost. True or False?

Thanks in advance