The following questions are independent of each other. Discuss the contents in each of the questions. Include the related diagrams with complete information. a) A union's objectives, constraints and optimization (8 Marks) b) A firm's labour demand curve and its iso-profit curves (10 Marks) c) A bargaining range between a union and firm (8 Marks) d) A Pareto-efficiency and contract curves (10 Marks) Revisit the ideas in Part c) in Problem #1. Under certain circumstances, it is possible for unions to better their interests by affecting or altering the union constraint in a direct or indirect manner. Could you recommend a strategy that may work for this goal, based on your microeconomics knowledge? How can unions put your strategy to work? Demonstrate the effect of your strategy in a diagram