Identify the line number where selection is first used in the algorithm shown in Figure 1.

Figure 1

1      age ← USERINPUT
2      price ← 0
3      IF age < 12 THEN
4          price ← 5
5      ELSE IF age >= 65 THEN
6          price ← 7
7      ELSE
8          price ← 10
9      ENDIF
10     WHILE price > 0
11         IF age < 5 THEN
12             DISCOUNT('FREE')
13         ENDIF
14         price ← price - 5
15     ENDWHILE