Create a relational database that has a product table, a customer table, an order table, and an order item table. In the product table, store an ID, name, picture, description, and price. In the customer table, store the ID, name, and address. In the order table, store the order ID and customer ID. In the order item table, store the order ID, product ID, and quantity. Write a function to let you find all orders for a given customer. Write a function to let you find all orders with a total cost greater than some specified value.