I will be doing a course in Information Theory soon and to get some early learning in I have been attempting a question with a joint probability mass function represented by the following table:

In the question I have been asked to find the value of D(X || Y).
I have been attempting this question for a few hours now and cannot seem to get the right answer and any sources I have found have not featured an example like this.
As I am not a person with a background in maths any help to understand this question would be greatly appreciated.
Thank you very much for your time.