A pet store has seven puppies, including four huskies, two terriers, and one retriever. If Rebecca and Aaron, in that order, each select at random, without replacement (they cannot both select the same one), find the probability of each event as a decimal rounded to 3 places.

a. Both select a husky.

b. Rebecca selects a retriever; Aaron selects a terrier.

c. Rebecca selects a terrier; Aaron selects a retreiver.

d. Both select a retriever