State whether the following are primarily microeconomic or macroeconomic policy issues:
a. Should U.S. interest rates be lowered to decrease the amount of unemployment?
b. Will the fact that more and more doctors are selling their practices to managed care networks increase the efficiency of medical providers?
c. Should the current federal income tax be lowered to reduce unemployment?
d. Should the federal minimum wage be raised?
e. Should Sprint and Verizon both be allowed to build local phone networks?
f. Should commercial banks be required to provide loans in all areas of the territory from which they accept deposits?