IIS Pool Memory Usage

gwmi -ComputerName srv09, srv11, srv12, srv14 -NS 'root\WebAdministration' -class 'WorkerProcess' | select PSComputerName, AppPoolName,ProcessId , @{n='RAM';e={ [math]::round((Get-Process -Id $_.ProcessId -ComputerName $_.PSComputerName).WorkingSet / 1Mb) }} | ConvertTo-Json