This presentation was delivered by Ambar Ansari, Abdul Latif and Dwi Ashari, it shows the definition of research problem and also research question. Moreover, it also shows how to define a good research question with several characteristics and it provides some examples in each criteria.
Reference: Fraenkel, J. R., Wallen, N. E., & Hyun, H. H. (2012). How to design and evaluate research in education (8th ed.). Singapore: McGraw-Hill Education.