Consider the following relation: TRIP (Trip_id, Start_date, Cities_visited, Cards_used) This relation refers to business trips made by company salespeople. Suppose the TRIP has a single Start_date, but involves many Cities and salespeople may use multiple credit cards on the trip. Insert few valid tuples in the table, and answer the following: (i) Discuss what FDs exist in this relation. (ii) Identify the candidate keys for derived FD's set. (iii) Show how you will go about normalizing it