POI jars required for Groovy in Soap?. | Receiving "unable to resolve class Workbook" in Soap UI.

I know that this question has been asked many times in many forums. But I couldn't find exact answer.

Could anyone please list down the POI jars required for Groovy in Soap UI.

I've copied all the required Jars to SOAP_HOME/bin/ext but still getting "unable to resolve class Workbook" error in console.

Following are the Jars that I've added.