You have been asked by a client to normalize the driver dimension and to create multiple fact tables for the receipts that a driver collects for each of the new aggregation levels. fill in the blanks with the field names used in the star schema to accomplish this task. facts: a driver is assigned to one and only one office. an office is in to only one region and may have many drivers. a region is located in one and only one country and a country can have many regions