A pizza restaurant sold 24 cheese pizzas and 16 pizzas with one or more toppings. Twelve of the cheese pizzas were eaten at work, and 10 of the pizzas with one or more toppings were eaten at work. If a pizza was selected at random, find the probability of each:
a. It was a cheese pizza eaten at work.
b. It was a pizza with either one or more toppings, and it was not eaten at work.
c. It was a cheese pizza, or it was a pizza eaten at work.