Non-member template functions always have parameters. True False The correct implementation for a post-decrement operator for a doubly linked list iterator is (done as an inline function) node_iterator operator-(){ node_iterator original("this): current = current rightarrow previous(): return original: } node_iterator operator--(int){ node_iterator original("this): current = current rightarrow previous(): return original: } node_iterator operator --(int){ node_iterator original ("this): current = current rightarrow previous(): return original: } node_iterator operator-(int){ node_iterastor original = current: current = current rightarrow current rightarrow next(): return original: } node_iterator operator --(int){ current = current rightarrow previous(): return 'this: } A linked list consists of an array of elements. an infinite set of nodes. a finite set of nodes. an abstract ordering of elements