Please help soon! Divide the set of data into four quartiles.

4, 5, 7, 11, 12, 15, 16, 18

First group = .

(1). 4 and 5

(2). 7 and 11

(3). 4, 5, 7, and 11

(4). 12, 15, 16, and 18

Second group = .

(1). 4 and 5

(2). 7 and 11

(3). 4, 5, 7, and 11

(4). 12, 15, 16, and 18

Third group = .

(1). 4 and 5

(2). 7 and 11

(3). 4, 5, 7, and 11

(4). 12, 15, 16, and 18

Fourth group = .

(1). 16 and 18

(2). 15, 16, and 18

(3). 4, 5, 7, and 11

(4). 12, 15, 16, and 18