One card is drawn from a standard 52-card deck. Determine the probability that the card is a) a club, b) a club, given that the card is a red card.
a) The probability that the card is a club is $\square$.
(Type an integer or a simplified fraction.)
b) The probability that the card is a club, given that the card is a red card, is $\square$.
(Type an integer or a simplified fraction.)

Step 1 ：The probability of drawing a club from a standard 52-card deck is the number of clubs divided by the total number of cards.

Step 2 ：There are 13 clubs in a deck of 52 cards.

Step 3 ：The probability is \( \frac{13}{52} \).

Step 4 ：Simplify the fraction \( \frac{13}{52} \) to \( \frac{1}{4} \).

Step 5 ：Final Answer: a) The probability that the card is a club is \( \boxed{\frac{1}{4}} \).

Step 6 ：Since the card is given to be a red card, the probability of it being a club is 0 because clubs are black cards.

Step 7 ：Final Answer: b) The probability that the card is a club, given that the card is a red card, is \( \boxed{0} \).