Write Sql commands for following  customer and order table:

(DBMS):

• Write a query to display name of items having maximum price.
• Write a query to calculate total no of orders placed by Ali and Junaid.
• Write a query to list name of all customers who either have placed order or not.
• Write a query to calculate average quantity of items by item wise.

Cust_ID	Name	City
1	Ali	Karachi
2	Waqar	Lahore
3	Junaid	Hyd
4	Irfan	ISB
5	Zain	Multan
Order_ID	Item	Price	Quantity	Cust_ID
1	pizza	1500	2	1
2	burger	800	1	1
3	pizza	450	3	3
4	Fries	250	2	3
5	soda	100	3	4