Please plan to answer two questions in one THREADThree citation from a professional book journal is

Please plan to answer two questions in one THREADThree citation from a professional book journal is

Please plan to answer two questions in one THREAD.  Three citation from a professional (book, journal) is a minimum requirement and should be in APA format.   1-What are procedures in qualitative research for reliability and validity? 2-Discuss the following briefly: research gap, saturation, peer checking, probes.