How can I answer these questions correctly?

9. Let's make a sandwich!!! At your fav sub shop you can choose your bread, meat, and condiments. The bread choices are white or rye. The meat choices are chicken, turkey, or roast beef. The condiment choices are mayonnaise or mustard. You may choose only one bread, one meat, and one condiment. a.) Make a Tree Diagram to show all of the possibilities: b.) How many possible sandwiches can be made? c.) What's the chance of you making a sandwich with rye bread, chicken, and mayo