{*** Name: Winnie Leung   Class: F.4CA   Class no.:  22   ***}
2)  The five stages of data processing in relation to customer 
    services provided by an electric power company are:
    a) Account registration for new customers and updating of 
       customer records  (Customer Records)
    b) Processing of monthly customer consumes 
       and prepare monthly statement  (Billing)
    c) Processing of payment and outstanding records 
    d) Filing of customer complaints and create database 
       for improvement
    e) Distribute job orders to maintenance department