Using (explicitly) the Calabresi-Melamed theory of transaction costs, justify the following rights by a property rule or a liability rule:
a) land owner's right to exclude a neighbor's gas line from his property.
b) new car owner's rights to have his car's defective engine replaced by the seller
c) homeowner's right to be free from air pollution by a nearby factory
d) spouse's right to half the house upon divorce.