Marketing audit that would support a marketing plan for a company

Produce a marketing audit that would support a marketing plan for a company of choice in one of the sectors. A literature review of the concepts of Segmentation, Targeting, and Positioning, as well as STP as a tool. Apply these concepts to an industry of the choice. How should a company make their STP choices? Specifically explain the process and decision making factors for a general company in that industry. Describe/analyse a series of decisions that a typical company might make as a part of their STP analysis.