In a deck of cards, there are 52 cards split evenly between red suits (hearts and diamonds) and black suits (clubs and spades). In each suit, there are cards numbered 2 through 10, a jack, a queen, a king and an ace. What is the probability of selecting two spades in a row?

1. 7.2%
2. 6.5%
3. 6.3%
4. 5.9%
5. 5.8%