For the following numerical attributes, state whether each is discrete or continuous.

(a) The number of insufficient-funds checks received by a grocery store during a given month.

a. discrete

b. continuous

(b) The amount by which a 1 lb package of ground beef decreases in weight (because of moisture loss) before purchase.

a. discrete

b. continuous

(c) The number of New York Yankees during a given year who will not play for the Yankees the next year.

a. discrete

b. continuous

(d) The number of students in a class of 35 who have purchased a used copy of the textbook.

a. discrete

b. continuous