a) Define the concept of an oligopoly in the context of microeconomics. Provide two real-life examples of industries that can be classified as oligopolies and explain why they fit this market structure. b) Using the kinked-demand curve model, graph, illustrate and explain the price rigidity that typically characterizes oligopolistic markets. Include labels and brief explanations of each segment of the kinked demand curve. c) Consider an oligopolistic firm operating in a monopolistically competitive market. Describe the concept of economies of scale and how it influences the production decisions of firms