A pizza restaurant sold 23 cheese pizzas and 19 pizzas with one or more toppings. Fourteen of the cheese pizzas were eaten at work, and 11 of the pizzas with one or more toppings were eaten at work. Choose a pizza at random. Find the probability that:

a. It was a cheese pizza eaten at work.

b. It was a pizza with 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.