Shuffle: Charles has three songs on a playlist. Each song is by a different artist. The artists are Drake, BTS, and Post Malone. He programs his player to play the songs in a random order, without repetition. What is the probability that the first song is by BTS and the second song is by Post Malone? Write your answer as a fraction or a decimal, rounded to four decimal places. The probability that the first song is by BTS and the second song is by Post Malone is