You are a systems analyst for a store that extends store credit. The store is planning to create a system for the handling of posting a customer payment for a store charge account.$$

You are to complete a decomposed lower$-$level data flow diagram $($DFD$)$ for the following requirements for a customer posting payment to a store charge account based on the Gane and Sarson shapes. The customer will send payment by mail and the payment will be posted through the system that updates the customer charge account.

The payments have to be deposited systematically to the bank, recorded in the general ledger by the system, and the system should automatically send the customer a receipt.

Your DFD should have two external entities, two data stores, and three processes.

The student reflects the correct data flow of the store credit payment system that identifies the following:

$($a$)$ at least three processes for this scenario that correctly describes the relevant processes based on the requirements

$($b$)$ the correct two data stores which would be databases

$($c$)$ the correct two external entities

$($d$)$ the proper data flow based on the requirements provided.