3. |5 points| The following questions refer to the production function (chapter 3) a) The letter \"A\" in the production function refers to Total Factor Productivity. What does this measure? Provide an intuitive explanation (not just the definition). b) Draw the production function (with N on the x-axis). ) Discuss intuitively what MPN (Marginal product of labor) measures? Explain. d) Why does the production function become flatter as the input rises? Explain. Le. you want to explain why there are diminishing returns to labor. ) Suppose that there is a positive shock to production (i.e. a positive supply shock that increases A). MMustrate the impact of the shock on the production function & the MPN curve. Make sure to draw two separate diagrams, one that shocks the impact on the production function and one that shows the impact on MPN. Label all curves & axes using the notation developed in lecture (or text)