At an ice cream ship, customers can order a sundae with 1 type of ice cream, 1 type of sauce, and 1 type topping. The types of ice cream are:
chocolate; strawberry; vanilla
The types of sauce are:
caramel, strawberry, chocolate,
The types of toppings are:
chocolate chips; peanuts;
If each type of ice cream, sauce, and topping is equally likely to be selected, what is the probability that a customer will order a sundae with vanilla ice cream, caramel sauce, and walnuts?