8. Find all the possible permutations.
You order sandwiches with rye bread (R), wheat bread (W), pumpernickel
(P), and sourdough (S). There are toppings of mustard (M), catsup (C),
and horseradish (H). On a separate piece of paper, draw tree diagrams
showing all the ways that the toppings can be matched with the breads.
Breads
Topping
Permutations
Rye Bread (R)
Wheat Bread (W)
Pumpernickel (P)
Sourdough (S)