Help me in solving GSQ68B problem

help
,
1

My issue

i am not able to solve this

My code

SELECT
    C.Customer_id,
    C.Customer_Name,
    C.Customer_Age,
    P.Purchase_id,
    P.Customer_id AS Purchase_Customer_id,
    P.Purchase_amt,
    P.Last_purchase_month
FROM
    Customer C
LEFT JOIN
    Purchase P
ON
    C.Customer_id = P.Customer_id

Learning course: Database management systems
Problem Link: Project - Left Join Two Tables in Database management systems