PK Customers customer_id PK address_id FK first_name last_name phone note Addresses address_id city state country note Factors Factor_id PK customer_id FK payment method_id FK date note Payment peyment_method_id PK payment_name note PK Factor_items factor_id FK _id FK quantity Price note goods good_id good_code good_name good cost good_group_id Good_groups good_group_id PK name taxrate note FK **Please answer the following questions using ORACLE SQL** i-) Which good_group (name) does have the most number of customers? (output : group name) ii-) What is the average number of goods in each factor? (output : a number) iii-) Which city has the most number of good_groups? (output : city name)