Describe the three designs and when is it appropriate to use each design?

There are various designs (i.e. fixed, flexible, and mixed) that help to shape and form one’s research. Each design has various methods associated with the design. After reviewing the Reading and Study material for this module and considering the three designs discussed in the text, please respond to the following:1.Describe the three designs and when is it appropriate to use each design?2.How are the designs similar?3.How are the designs different?4.What specific methods are related to each of these designs?