Final answer:
The cardinality of the power set of (a/c) is 2.
Step-by-step explanation:
The power set of a set is the set of all possible subsets of that set. In this case, the set is (a/c). The cardinality of a set is the number of elements in that set.
The set (a/c) contains only one element, so the power set will contain all possible subsets of that element, including the empty set.
Therefore, the cardinality of the power set of (a/c) is 2, since there are two subsets: the empty set and the set (a/c) itself.