Suppose you are ordering a large pizza from D.P. Dough. You want 3 distinct toppings, chosen from their list of 11 vegetarian toppings.

1. How many choices do you have for your pizza?

2. How many choices do you have for your pizza if you refuse to have pineapple as one of your toppings?

3. How many choices do you have for your pizza if you insist on having pineapple as one of your toppings?

4. How do the three questions above relate to each other? Explain.