Help me in solving SQW33 problem

help
,
1

My issue

give answer of this question

My code

WITH RankedSales AS (
    SELECT 
        ps.product_id,
        ps.month,
        ps.units_sold,
        RANK() OVER (PARTITION BY ps.product_id ORDER BY ps.units_sold ASC) AS rank
    FROM 
        division_product_sales ps
    JOIN 
        product_catalog pc 
    ON 
        ps.product_id = pc.product_id
)
SELECT 
    product_id,
    units_sold,
    month
FROM 
    RankedSales
WHERE 
    rank = 1
ORDER BY 
    product_id;

Learning course: Database management systems
Problem Link: Project - Correlated Subquery and Table Join in Database management systems