diff --git a/your-code/solutions.sql b/your-code/solutions.sql
index e69de29..9ee4461 100644
--- a/your-code/solutions.sql
+++ b/your-code/solutions.sql
@@ -0,0 +1,76 @@
+USE publications;
+
+
+/*Challenge 1 - Most Profiting Authors*/
+/*Using temporary tables*/
+
+/*Step 1: Calculate the royalties of each sales for each author*/
+CREATE TEMPORARY TABLE royalties_sale_author
+SELECT titles.title_id, titleauthor.au_id, 
+titles.price * sales.qty * titles.royalty / 100 * titleauthor.royaltyper / 100 AS sales_royalty
+FROM titleauthor
+INNER JOIN sales
+ON sales.title_id = titleauthor.title_id
+INNER JOIN titles
+ON titles.title_id = sales.title_id;
+
+SELECT * FROM royalties_sale_author;
+
+/*Step 2: Aggregate the total royalties for each title for each author*/
+CREATE TEMPORARY TABLE total_royalties_title_author
+SELECT title_id, au_id, SUM(sales_royalty) AS aggregated_royalties
+FROM royalties_sale_author
+GROUP BY title_id, au_id;
+
+SELECT * FROM total_royalties_title_author;
+
+
+/*Step 3: Calculate the total profits of each author*/
+SELECT au_id, SUM(aggregated_royalties + titles.advance) AS profits
+FROM total_royalties_title_author
+INNER JOIN titles
+ON titles.title_id = total_royalties_title_author.title_id
+GROUP BY au_id
+ORDER BY profits DESC
+LIMIT 3;
+
+
+/*Challenge 2 - Alternative Solution*/
+/*Using derived tables*/
+
+SELECT au_id, SUM(aggregated_royalties + advance) AS profits
+FROM (
+    SELECT titleauthor.au_id, titleauthor.title_id, titles.advance,
+    SUM(titles.price * sales.qty * titles.royalty / 100 * titleauthor.royaltyper / 100) AS aggregated_royalties
+    FROM titleauthor
+    INNER JOIN sales 
+    ON sales.title_id = titleauthor.title_id
+    INNER JOIN titles 
+    ON titles.title_id = titleauthor.title_id
+    GROUP BY titleauthor.au_id, titleauthor.title_id, titles.advance
+	) AS author_royalties
+GROUP BY au_id
+ORDER BY profits DESC
+LIMIT 3;
+
+
+/*Challenge 3*/
+
+CREATE TABLE most_profiting_authors (au_id VARCHAR(11), profits FLOAT);
+
+INSERT INTO most_profiting_authors
+SELECT au_id, SUM(aggregated_royalties + advance) AS profits
+FROM (
+    SELECT titleauthor.au_id, titleauthor.title_id, titles.advance,
+    SUM(titles.price * sales.qty * titles.royalty / 100 * titleauthor.royaltyper / 100) AS aggregated_royalties
+    FROM titleauthor
+    INNER JOIN sales 
+    ON sales.title_id = titleauthor.title_id
+    INNER JOIN titles 
+    ON titles.title_id = titleauthor.title_id
+    GROUP BY titleauthor.au_id, titleauthor.title_id, titles.advance
+) AS author_royalties
+GROUP BY au_id
+ORDER BY profits DESC;
+
+SELECT * FROM most_profiting_authors
\ No newline at end of file