A pizza parlor offers 12 different toppings. 1. How many 3-topping pizzas could they put on their menu? Assume double toppings are not allowed. 2. How many total pizza are possible, with between zero and twelve toppings (but not double toppings) allowed? 3. The pizza parlor will list the twelve toppings in two equal-sized columns on their menu. How many ways can they arrange the topping in the left column?.