SQLQuokkaSQLQuokkaMeta's 'People You May Know' feature suggests two users to each other when they are not yet friends but share at least 2 mutual friends. The `friendships` table stores each friendship once (as a single row, in either direction), and friendship is symmetric. Write an SQL query that returns each recommended pair once, as `user_id`, `recommended_user_id` (with `user_id` smaller than `recommended_user_id`) and `mutual_friends` (the number of friends they have in common). Order the results by `mutual_friends` descending, then `user_id` ascending, then `recommended_user_id` ascending.
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