Suppose we want to choose 5 objects, without replacement, from 13 distinct objects. (a) How many ways can this be done, if the order of the choices is taken into consideration?

(b) How many ways can this be done, if the order of the choices is not taken into consideration?

Answer asap and if you do you will get brainliest. catherine buys a gallon of ice cream from the store. after taking it home, she eats a fifth of a gallon of ice cream. her sister eats some of the ice cream as well. if two-thirds of the original amount of ice cream is left, then what fraction of a gallon of ice cream did her sister eat?