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Examine these statements executed in a single Oracle session: CREATE TABLE product (pcode NUMBER(2),pname VARCHAR2(20)); INSERT INTO product VALUES(1,'pen'); INSERT INTO product VALUES (2,'pencil'); INSERT INTO product VALUES(3,'fountain pen'); SAVEPOINT a; UPDATE product SET pcode=10 WHERE pcode =1; COMMIT; DELETE FROM product WHERE pcode =2; SAVEPOINT b; UPDATE product SET pcode=30 WHERE pcode =3; SAVEPOINT c; DELETE FROM product WHERE pcode =10; ROLLBACK TO SAVEPOINT b; COMMIT; Which three statements are true: