Write SQL query statements to query the following DoorDash like grocery delivery database Tables. Customers make orders from grocery stores delivered by a delivery person. "cid" is Customer ID. "did" is the ID of a deliverer. "oid" is the ID of an Order. "Rating" is the customer's satisfaction rate with a driver on a certain order. Rating is a numerical value from 1 to 10 with 10 representing most satisfactory. "cost" is the total cost of this order. Requires a single SQL statement as answer to each question unless otherwise noted. Customers Deliverers Feedbacks Find customers' first and last names who spent more than $20 in a single delivery that is delivered by "John Doe". 8. Using SQL, add a foreign key constraint to the Feedbacks and Orders table. If a Deliverer's id is updated in the Deliverers table, the Deliverers id is changed to NULL in the Feedbacks table, but the id is also updated in the Orders table