Please help, I want to understand this

Write a static method called pairstrings that accepts a List (abstract form of ArrayList) of strings as a parameter and replaces each pair of strings with a single string that consists of the two original strings in parentheses separated by a space.If the list is of odd length, the final element is unchanged. Assume you are given a List with at least one string. Only functions in Chapter 10 are allowed. Yo new list. For example, suppose that a list contains (to, be, ar, not, to, be, that] Your method should change the list to store (to be), (or not), (to be). that) u must build the new strings using String.format). Modify the input List, do not build a on not), (to be), that]