Help me in solving GSQ05 problem

My issue

I am Not Able To Solve and Understand these Question Please Some Help Mre in Solving this question and Suggest How can I improve solving SQL questions on My Own .

My code

INSERT INTO EMPLOYEE(Employee_id,Employee_Name,Department)VALUES(4, 'Marcus Garcia', 'Product');

Learning course: Learn SQL
Problem Link: Practice Problem in - CodeChef