Consider the following an ER-diagram Date Time Time stamp SHIP_MOVEMENT Longitude Latitude HISTORY Typo Tonnage Hull Sname N SHIP TYPE SHIP TYPE Owner (0,1) N Start date End date (1,1) HOME PORT SHIP AT PORT (0,1 N 1 IN PORT_VISIT Continent Name STATE/COUNTRY Name SEA/OCEAN/LAKE Prame PORT N ON Map the above ER-diagram into a relational schema and specify all primary keys and foreign .keys