1.1 How does porter’s competitive forces model help companies develop competitive strategies using information systems?

[answerhappygod]

1.1 How does porter’s competitive forces model help companies
develop competitive strategies using information systems?
1.2 How do the value chain and value web models help business
identify opportunities for strategic information system
applications?
1.3 There are major responsibilities of system administrator as
listed below:
o Start-up and shut down the system
o Performance tuning
o Managing user accounts
o System security
o Backup and recovery
o Manage system resources
o Install patches and updates
Describe in details each of the above responsibilities of system
administrator.