It is reasonable to expect that the supply of bananas is relatively inelastic. It take time to plant new banana trees and grow them until they bear fruit. Bananas are also highly perishable, so they cannot be stored when prices are low and sold when prices go up. Cigarettes should have a relatively more elastic supply. At most, it takes a year to grow a new tobacco crop, but tobacco and cigarettes can be stored relatively cheaply and easily.

It seems likely that bananas will have elastic demand, since most other fruits are reasonable substitutes. Cigarettes are highly addictive (some say the most addictive product, legal or illegal) and there are no close substitutes (ask a smoker), thus demand should be relatively inelastic.
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