C2. Prepare a Decision Table for the Airfare Discount problem. Also write the total number of columns in this decision table. The passengers are treated according to three categories: Type of Flight, Frequent Flyer and Age Group. The possible values of each category are: Type of Flight: International (I), Local (L) Frequent Flyer: Yes (Y), No (N) Age Group: I (Infant: 16) The system has four different types of discounts: 80%: Infant passengers travelling in Local flight are eligible 70%: Infant passengers travelling in International flight are eligible 20%: Young Frequent Flyers, travelling in International flight 15%: Other Frequent Flyers, travelling in any flight