Ice cream flavor: Chocolate, Strawberry, Peach, Vanilla

Toppings: Caramel, fudge, Marshmallow, M&Ms, Nuts, Sprinkles

a) How many sundaes are possible using 1 flavor of ice cream and 3 toppings?

b) How many sundaes are possible using 1 flavor of ice cream and from 0 to 6 toppings?

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Please explain. Thanks