XSLT mapping help to add namespace in the existing node

Hi,

I need help with XSLT mapping for the below requirement:

Current:

<?xml version="1.0" encoding="UTF-8"?>

<StudyDetails>

  <Name>

  <Age>

</StudyDetails>

Required :

<?xml version="1.0" encoding="UTF-8"?>

<ns0:StudyDetails xmlns:ns0="urn:sap:com">

<Name>

<Age>

<ns0:StudyDetails>

I want the namespace to be added in the existing node.

I don't want an extra node to be added.

Please help me with this requirement.