For each of the following transactions, indicate whether the transaction represents any US value added, and whether it should be counted as part of US aggregate spending, and if so, which part, and if not, why not. 3 points each. (a) A firm in Seattle produces cement and sells it to a Seattle construction company to be used in a new apartment building. 2 points. (b) A firm in Toronto, Canada, purchases a copy of Microsoft Windows from Microsoft to operate the computers they use to design buildings. 2 points. (c) An entrepreneur purchases all the outstanding shares of the public company Twitter. 2 points. (d) A consumer in Seattle purchases hiking boots from REI that were produced in the United States, in order to hike Mount Rainier. 2 points