Answer the following questions according to the ERD of the Airport system: AIRPORT AIRPORTCODE AIRPOR NAME FLIGHT FLIGHTNUM DTIME DDATE ATIME ADATE DESTINATIONAIRPORT PRICE FK AIRPORT1 CUSTOMER CUSTOMERNUM FIRSTNAME MIDDLENAME LASTNAME STREETNUMBER STREETNAME CITY STATE PHONE CITY STATE AIRPLANENUM(FK) AIRPORTCODE(FK) FK AIRPORT I FK_ARPLANE FK_FLIGHT FK_CUSTOMER AIRPLANE AIRPLANENUM AIRPLANENAME PAYMENT FLIGHTNUM(FK) CUSTOMERNUM(FK) CREDITCARDTYPE САРАСТY AIRPORTCODE(FK) CREDITCARDNUM BOOKDATE HOLDDATE EXPIREDHOLDDATE How many primary key in the Flight entity? A. 4 В. 1 How many tables in the system can Customer table retrieve data from? C. 5 How many attributes in the Airport Table? D.5 How many tables in the system? E. 5 How many relationships shown in the system?

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