(! my guess is either a or d but i want to make sure.)
is the following definition of dog reversible? if yes, write it as a true biconditional.
a dog is a mammal.
a. the reverse is false.
b. the reverse is true. an animal is a dog if (and only if) it is a mammal.
c. the reverse is true. an animal is a mammal if (and only if) it is a dog.
d. the reverse is true. if an animal is a dog, then it is a mammal.

70 points ! pls 2. given the following two sets of data what is the union of the two sets and what is the intersection of the two sets. set a = {1, 2, 3, 4, 5, 6, 7, 8, 9} set b = {2, 4, 6, 8, 10, 12, 14} 3. given a regular deck of cards. describe a way of pulling cards that would create a dependent event and then one that would create an independent event. 4. what is the probability of drawing a red card and then drawing a spade without replacing the card that was drawn first?