Answer:
Step-by-step explanation:
In case a cadbury's chocolate as cadbury owns the 80 percent of the market.
In case b water as water is daily need and cost of making is low and selling is high
in case c ciggrates are more elastic as for now ciggrates are addiction for large number of people.
In case d computer is used in day to day life and its easy to carry information rather than notepad
case e heating oil in one week as massaging body per week in required
case f bread is cheap as per caviar so large number of people can have in every case