6-8-page essay using our LibraryGuide for PHIL101 and our Online Library to answer the followingquestions: Consider the following     philosophical puzzle: “If a tree falls in the forest and there’s no one     around to hear it, does it make a sound?” (1) How is this philosophical     puzzle an epistemological problem? And (2) how would John Locke answer it?At the end of week four you will turnin (1) a clearly articulated thesis statement, and (2) a selected list ofappropriate sources using our LibraryGuide for PHIL101 and our Online Library, as indicated below:1. Identifyat least one encyclopedia, or similar work, providing a big picture overview ofkey issues your topic needs to address.2.  Identify at least one secondarysource, an interpretive work, addressing your topic which was written bysomeone other than the philosophers identified in your topic.3.  Identify at least one primarysource, from a major philosopher identified in your topic choice. Be sure thatthe primary source selected pertains to the issues raised by your topic. 4.  Identify at least one journalarticle database, available in the APUS Online Library, where contemporaryphilosophical articles pertaining to your topic, can be located. Explain briefly how the content ofeach source will assist you with your Philosophical Essay Assignment. Provide acomplete reference in MLA style for each work, 1-3, selected.