Provide working SQL DML statements for the following database schema and queries

Provide working SQL DML statements for the following database schema and queries EXERCISE CUSTOMER INVENTORY (ID, ItemName, Type, MadeInStore, SupplierName, D, Type, Firstname, Lastname, Address, City) Daily AverageSold, Price) ORDERS (ID, Customer_FK, Item_FK, Quantity, DeliveryDate) 7. Delete customers having firstname starting by g 8. Delete customers that have not placed any order 9. Delete all data from table CUSTOMER_BACKUP 10