Questionnaire about mobile phones
15
18
13
19
17
17
17
16
17
18
20
18
18
16
17
12
20
12
20
40
17
20
24
19
16
22
17
25
16
15
12
19
20
15
shruti singh
16
17
16
19
19
79
18
14
16
20
22
19
16
17
17
21
18
19
18
16
16
20
18
20
18
18
17
15
15
19
22
34
18
21
16
32
19
15
24
18
18
20
16
18
17
29
17
17
18
14
19
17
18-year-old
44
74
13
18
19
18
16
20
24
22
hello
18