Need SQL query please.

Section B Answer the following question by executing SQL statements through Xampp's PHP MyAdmin SQL window. Question 5: Show the number of customers assigned to each of the employee. Question 6: From the invoices, show the which country's customers spent the most on the tracks. Question 7: Show the top 3 artists based on their track sales. Question 8: Show the track name names, album name, artist name and genre of all the artist whose names contains last letter from your artist name