A chosen brand-Wren Kitchens Conduct research using academic and industry source

A chosen brand-Wren Kitchens
Conduct research using academic and industry sources(800 words).
Using the following topics :
a).what is Marketing Mix and how does it fit with customer Oriented Brand Strategy?
b).what makes a Sustainable Customer Oriented Marketing Strategy?
Please show synthesis and integration of range of research informed information using academic/professional literature(from UK).Both in-text citations and the reference list should follow Harvard Referencing Style.