#Requires -version 2.0

#array of process names
$Procs="iexplore","chrome","firefox"

$Procs | foreach {
 #get the earliest start time
 $started=Get-Process $_ | sort StartTime | Select -first 1
 #create a custom object
 New-Object PSObject -Property @{
  Name=$_
  WS=(get-process $_ | measure-object ws -sum).sum/1mb
  Report=Get-Date
  Started=$started.StartTime
  Elapsed=(Get-Date)-($Started.StartTime)
 }
} #foreach