Normalizing a database

I'm new to databases and require some assistance. I am a bit lost but have laid down all the tables for UNF and would like to convert them to 3NF outlying the Primary Keys and Foreign Keys in each table. I just want to know if I've done this correctly. If not, can you assist me in seeing where I went wrong? There are some that I couldn't figure out how to go from 1NF to 2NF and just jumped straight to 3NF. I do not have any other human resources to direct my questions to so I will be greatful to any help I receive from you all. Please and Thank you all so very much.

1.

• UNF

  • CustomerNumber (P)
  • CustomerName
  • InvoiceNumber (P)
  • InvoiceDate
  • ProductID (P)
  • ProductName
  • Price
  • Quantity
  • ProductEdition

• 1NF

  • Customer =TABLE NAME
  • CustomerNumber = PRIMARY KEY
  • CustomerName
  • Invoice = TABLE NAME
  • InvoiceNumber = PRIMARYKEY
  • InvoiceDate
  • CustomerNumber = PRIMARY KEY
  • ProductID = PRIMARY KEY
  • Quantity
  • ProductName
  • Price
  • ProductEdition

• 2NF

  • Customer = TABLE NAME
  • CustomerNumber = PRIMARY KEY

  • CustomerName

  • Invoice = TABLE NAME

  • InvoiceNumber = PRIMARY KEY
  • InvoiceDate

  • Quantity

  • Product = TABLE NAME

  • ProductiD = PRIMARY KEY
  • ProductName
  • Price
  • ProductEdition

• 3NF

  • Customer = table name
  • CustomerNumber (P) = primary key

  • CustomerName

  • Invoice = table name

  • InvoiceNumber (P) = primary key
  • InvoiceDate

  • InvoiceCost

  • Product = tablename

  • ProductiD (P) = primary key
  • ProductName
  • ProductEdition

  • Price

  • InvoiceCost = table name

  • Quantity
  • ProductID
  • InvoiceNumber (P) = primary key
  • Product

InvoiceNumber to ProductID = One-to-many relationship

2.

• UNF

  • ProductID
  • Title
  • Edition
  • PurchaseCost
  • RetailPrice
  • Author

• 1NF

  • Product = table name
  • ProductID (P)
  • Title
  • Edition

  • Author

  • ProductCost

  • ProductID (P)
  • PurchaseCost
  • RetailPrice

• 3nf

  • Product = table name
  • ProductID (P)
  • Title
  • Edition

  • Author

  • ProductCost = table name

  • ProductID (P)
  • PurchaseCost
  • RetailPrice

Title to Author= one to many Purchase cost and ProductID = one to one relationship

3.

• UNF

  • EMP_ID
  • EMP_NAME
  • SOC_INS
  • POSITION
  • SUPERVISOR
  • HIREDATE

• 1NF

  • Employee
  • EMP_ID
  • EMP_NAME
  • Position

  • Hiredate

  • Supervisor

  • SupervisorName
  • SupervisorID

• 3NF

  • Employee
  • EMP_ID
  • EMP_NAME
  • PositionID
  • Hiredate
  • SupervisorID

  • SOC_INS

  • Supervisor

  • SupervisorName

  • SupervisorID

  • Position

  • PositionID
  • JobTitle

EMP_ID has a one to one relationship with SOC_INS

4.

• UNF

  • Cust_id
  • Name
  • Location
  • Sales_rep

• 1NF

  • Customer = table name
  • Cust_ID = primary key
  • Name

  • Location

  • SalesReps = table name

  • Sales_Rep = primary key

• 3NF

  • Customer = table name
  • Cust_ID = primary key

  • Name

  • SalesReps = table name

  • Sales_Rep = primary key

  • RepName

  • Location = tablename

  • City
  • LocationID = primary key

Cust_id to sales_rep = one to one Sales_rep to cust_id = one to many