Q.Algerian Dwarf Clementine: take 2
I have added a photo of the current condition showing the top portion without the leaves and bottom with healthy leaves.

Actually here are links to the photos:
http://s14.imagestime.com/out.php/i1075868_april182016.jpg
http://s14.imagestime.com/out.php/i1075869_june132016.jpg
http://s14.imagestime.com/out.php/i1075871_july192016a.JPG
http://s14.imagestime.com/out.php/i1075872_july192016c.JPG

We did not receive the image.
Here is a link with information on care of a Mandarin Tree.
https://www.gardeningknowhow.com/edible/fruits/tangerine/mandarin-orange-tree-care.htm