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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def CreateSitelinkFeedItem(feed_items, feed_item_id):
 """Creates a Sitelink Feed Item. Args: feed_items: a list of all Feed Items. feed_item_id: the Id of a specific Feed Item for which a Sitelink Feed Item should be created. Returns: The new Sitelink Feed Item. """

  site_link_from_feed = feed_items[feed_item_id]
  site_link_feed_item = {
      'sitelinkText': site_link_from_feed['text'],
      'sitelinkLine2': site_link_from_feed['line2'],
      'sitelinkLine3': site_link_from_feed['line3'],
  }

  if 'finalUrls' in site_link_from_feed and site_link_from_feed['finalUrls']:
    site_link_feed_item['sitelinkFinalUrls'] = {
        'urls': site_link_from_feed['finalUrls']
    }

    if 'finalMobileUrls' in site_link_from_feed:
      site_link_feed_item['sitelinkFinalMobileUrls'] = {
          'urls': site_link_from_feed['finalMobileUrls']
      }

    site_link_feed_item['sitelinkTrackingUrlTemplate'] = (
        site_link_from_feed['trackingUrlTemplate'])
  else:
    site_link_feed_item['sitelinkUrl'] = site_link_from_feed['url']

  return site_link_feed_item