Q2. Draw a use case diagram that covers the future system as described in the previous question. (7 marks).

Both the Pergola Man and his customers need to login to use

some functions of the site.  When logged

in, the Pergola Man can create and delete users of the web site as well as

modify user details such as their passwords or email addresses.  The Pergola Man can also send quotations and

invoices, as well as use an email form when logged in.  Customers must log in to see their invoices,

but they don’t need to log in to accept a quotation.  They are sent an email with a link.  If they accept a quotation, Pergola Man is

sent a message to create a user account for the customer, which will then

automatically email the customer his/her user account details.  If the customer chooses not to accept a

quotation, Pergola Man is sent a message indicating that the customer is not

interested.