Determine whether each statement is true, false, or uncertain and explain why. Answers with no explanation will receive no points.

a) The annual business income tax can raise tax revenue without reducing investment (i.e., capital). b) If people save from their working-age labor earnings in order to consume in retirement, the capital income on those savings should not be taxed. c) The Coase Theorem implies that there are the optimal number of murals on the sides of buildings, since the buildings' owners clearly own the buildings and thus there are well-defined property rights. d) A Blue Angels performance (i.e., airplanes doing special maneuvers) over San Francisco Bay is an example of a pure public good for Bay Area residents.