Exercise S. Consider the four-person house swapping game defined by the following preferencest b d C Ct C C DI C (s; Show that the allocation Qz (Ab. Be, Cd, De) is in the core. (b) Show that it is weekly dominated by the alloce- tion that gives all traders their First choice. (cl formulate the same in which the same four traders start with the allocation Q , and determine its core and strict core