last possible child's attribute

[Michalmas]

Hello guys,

What i need to get in xquery is the last possible child's attribute.

Let's say i have following XML:

<a>
  <aa lc=1>
     <aaa lc=00>
     </aaa>
  </aa>
  <bb lc=0>
  </bb>
  <zz lc=1>
     <ccc lc=123>
     </ccc>
  </zz>
</a>

and i want to get the last child of 'a' node. So, in this case, it would be
node 'ccc'. Then, i want to get lc attribute - in this example, 123.

Thanks!
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