Reading homeworks are intended to ensure that you have read the assigned material. It is perfectly fine if you are not able to answer all the questions correctly. However I expect you should typically get at least 1/2 of the questions right. You will get full credit as long as you have put in the effort to complete it, and a large fraction of the answers are correct (ignore the score that ELMS gives).
Also note that: reading homeworks are mandatory; you can miss at most 2, but missing more than that will lead to lower overall grade points for the reading homeworks.
The reading assignment here is: Chapters 2.6 (Relational Operators), 3.1, 3.2, 3.3.1
You don't need to read 3.2 carefully -- I suggest skimming through it so you are familiar with the basics of how tables are created, and how data is added/removed.
We have posted two Jupyter Notebooks that cover this material interactively.