Hello - I've had a variegated rubber tree plant for about 2 months and it's developed a few problems that appear to be getting worse. I noticed crispy brown edges so I just moved it to a less bright place, but have also noticed rusty-looking streaks on the undersides of the leaves (see photo). Also, the tops of a few leaves have scaley brown areas in the middle of the leaves (see photo). Many of the leaves have small brown spots, mostly in the white areas. Lastly, the 2 newest leaves were waxy and oddly colored (very bright green) and were very small (see photo). I would greatly appreciate any help you can provide in diagnosing my plant's problems. This is such a beautiful plant and I want to give it the care it needs. Thank you so much!