An issue of Consumer Reports found widespread contamination and mislabeling of seafood in supermarkets in New York City and Chicago. The study revealed one alarming statistic: 40% of the swordfish pieces available for sale had a level of mercury above the Food and Drug Administration (FDA) maximum amount. For a random sample of three swordfish pieces, find the probability that
a. All three swordfish pieces have mercury levels above the FDA maximum.
b. Exactly one swordfish piece has a mercury level above the FDA maximum.
c. At most one swordfish piece has a mercury level above the FDA maximum.