solve with details please

Question 4: Please analyze the following scenario and draw an ER diagram using Crow's Foot Notation. The requirements for invoicing system include: (.../4 Marks) - An invoice is written by a sales representative who is uniquely identified by ID number and has a name and an address. He or she can write many invoices, but each invoice is written by only one sales representative. - Each invoice can be identified by a unique invoice number and has a date, time and price. - The invoice is issued for a single customer. But each customer can have many invoices. The minimum properties for customers are ID number (unique for all customers), name, email address, and phone number. - Each sales representative is assigned to a single department, and each department can have one and only up to four sales representatives. Each department has a name and a unique code. Identify the participating entity types, the relationship type, and the attributes of each entity type, the primary key, the foreign key, the cardinality ratio. and