Table 2.

The preferences of users.

User	Preferences
P1	(Indifference, Indifference, 18–30, Luxury, Female)
P2	(Indifference, Indifference, 18–45, Indifference, Indifference)
P3	(Non-smoking, Yes, 31–70, Indifference, Female)
P4	(Indifference, Indifference, Indifference, Indifference, Indifference)
D1	(Non-smoking, No, Indifference, –, Male)
D2	(Non-smoking, No, 31–45, –, Male)
D3	(Indifference, Indifference, Indifference, –, Indifference)