State two specific functions or jobs that should be segregated in the sales order processing system. 

2. What specific internal control procedure would prevent the sale of goods on account to a fictitious customer? 

3.Goods are shipped to a customer, but the shipping department does not notify billing and the customer never receives an invoice. Describe a specific internal control procedure that would detect this error. 

4. A clerk embezzles customer payments on account and covers up the theft by making an adjustment to the accounts receivable ledger. Describe a specific internal control procedure that would prevent this fraud. 

5. What are the three rules that ensure that no single employee or department processes a transaction in its entirety?