The Brown Accounting and Recount Firm (BARF) has contacted you to create a personnel database to keep track of their employees. The following constraints are available: The company has just one single location The company is organized into departments Each department has multiple employees Each employee is assigned to one department at a time Each employee has a personnel history (promotions, raises, transfers, etc.) Each employee is assigned a phone number that does not change Each employee is assigned to an office which could change (when transferred, promoted, etc.) Draw an ER-Diagram of your database design for BARF and document a reasonable number of fields for your tables using DBDL (your db design must be in 3NF!). Identify any assumptions you made that will assist in my understanding of your solution. (Must be included)