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Suppose that the video game company Ultravision releases a new game called "Call of Obligation: Modern Combat $3."$ This game can be analyzed using the tools of both microeconomics and macroeconomics. Classify each item below according to whether it represents an application of microeconomics or macroeconomics.

a$.$ Is Ultravision able to sell all of the "Call of Obligation" games it produces or does it need to produce more?

b$.$ How does Ultravision choose to market "Call of Obligation."

c$.$ How much will Ultravision pay the developers of the game?

d$.$ How much less economic output occurs countrywide because workers call in sick to stay home and play either "Call of Obligation" or another video game?