Complete the following statements. The first quartile (Q1) corresponds to the th percentile. The median corresponds to the th percentile. The third quartile (Q3) corresponds to the th percentile.

Step 1 ：The first quartile (Q1) corresponds to the 25th percentile. This is because the first quartile is the median of the lower half of the data set, which is the 25th percentile.

Step 2 ：The median corresponds to the 50th percentile. This is because the median is the middle value of the data set, which is the 50th percentile.

Step 3 ：The third quartile (Q3) corresponds to the 75th percentile. This is because the third quartile is the median of the upper half of the data set, which is the 75th percentile.

Step 4 ：Final Answer: The first quartile (Q1) corresponds to the \(\boxed{25th}\) percentile. The median corresponds to the \(\boxed{50th}\) percentile. The third quartile (Q3) corresponds to the \(\boxed{75th}\) percentile.