3. Identify attribute(s) that could be the primary key in the table below? You can identify a natural PK or create a surrogate PK if no natural PK is found. It could be a simple PK or a composite PK. (5 points) cust_ID order_Id product_code product_count C01 0001 P007 23 CO2 0123 POO7 19 CO2 0123 P230 82 C01 0001 P890 42