Question 21 (1.25 points] Why.' do tigers face the threat of extinction while sheep do not? Q there are still lots of sheep that roam free in New Zealand. while most tigers are in zoos 0 sheep generate income for farmers, but tigers have no market value 0 there is a high demand for wool O sheep are owned by farmers, while tigers are owned by no one Question 22 (1.25 points) Thelma's current income is $120,000 and she currently pays $30,000 in income tax. Any income she earns above $100,000 is taxed at 40 percent. Which of the following correctly calculates her tax burden? her marginal tax rate is 30 percent O her average tax rate is 40 percent O her marginal tax rate is 25 percent O her average tax rate is 25 percent