An administrator has received complaints from users that an application is not available while other applications  run. This  application  resides  on  an  NFS  mounted  filesystem.  
Which  of  the  following  commands should be run as a reasonable first step to handle this problem（）

An administrator has received an update CD with the latest technology level for AIX 5.3. The current  operating system level of the sever is at base AIX5.3. 
What action needs to be taken to apply the new  technology level to the server（）

An administrator is at a remote data center assisting a colleague who is replacing a bad fibre channel  adapter. 
Which command can be used to manage a hot plug slot without powering off or rebooting the  server（）

A production system needs to be upgraded from AIX V5.2 to AIX V5.3. All system logs and users need to be saved. 
Which installation method will accomplish the upgrade（）