Create a database called sales and then, create the following tables with the appropriate data type for each column and inset data, you should apply the primary key and foreign key constraints. Not: you can use null to express the null values during inserting data. Salesman table: Customer table: 1. Find those salesmen with all information who gets the commission within a range of 12 and 14 ordered by the name. 2. Find the highest grade for each of the cities of the customers. 3. Find the name and city of those customers who are served by a salesman