9892:
Noise due to high ISO. You need to use a tripod for these kinds of pictures, and you will need proper lightning. With a tripod, there won't be a need for a high ISO. Proper lighting will ensure for correct shadows. A reflector could be enough for this picture.
You will need to clean up your “floor” before or after the picture… and probably twice, physically before and digitally after…

9883: Same remarks. In addition, the coffee on the right lacks crema. That would make the picture more interesting.
026: Your picture is underexposed as shown on the histogram.

I agree with @Ricky336 that the focus is bad. It's too narrow, and even what is in focus seems to slightly unsharp.