this question is for software project management

QUESTION 9 An invoicing system is to have the following components amend invoice, produce invoice, produce monthly statements, record cash payment, clear paid invoices from database, create customer records, delete customer (a) What physical dependencies govem the order in which these transactions are (5 marks) (b) How could the system be broken down into increments which would be of some mplemented? value to the users (hint-think about the problems of taking existing details onto a database when a system is first implemented)