Game engine concepts, building Ogre Programs questions. pls help me to answer this question.

Find out what OIS does in Ogre 1.9 and what replaces it in Ogre 1.10 2. If a child scene node is at relative position (2,4,-4) and the parent scene node is at (3,4,8), then were is actual location of the child scene node? 3. What functionality of the camra is depreciated in Ogre 1.10 4. 5. What is a framelistener and why does Ogre need them