The following figure shows an ER diagram for a database that may be used to keep track of transport ships and their locations for maritime authorities. Map this schema into a relational schema and specify all primary keys and foreign keys. Date Time_stamp Time SHIP_MOVEMENT Longitude Latitude HISTORY Type Tonnage Hull M Sname N SHIP TYPE SHIP_TYPE Owner 1 Start date End_date M HOME PORT SHIP AT PORT_VISIT PORT Continent Name M IN STATE/COUNTRY Pname PORT Name N ON SEA/OCEAN/LAKE