which sentence or sentences have correct parallel structure? on most saturday and sunday afternoons, you…

which sentence or sentences have correct parallel structure? on most saturday and sunday afternoons, you will find my mother in either her garden or at the library. on most saturday and sunday afternoons, you will find my mother either in her garden or at the library.
Answer
Brief Explanations:
Parallel structure requires that words, phrases, or clauses in a list or comparison have the same grammatical form. In the second sentence, "either in her garden or at the library" has consistent prepositional - phrase structure. The first sentence has an incorrect placement of "either" which disrupts parallelism.
Answer:
On most Saturday and Sunday afternoons, you will find my mother either in her garden or at the library.