Answer the following questions from your book and other outside resource. I only need your answers and citations. (does not need to be in essay form) 1. What is the purpose of a PFT (pulmonary function test)? 2. How is it performed? 3. What are the expected findings? 4. What are the steps required to administer an inhaled medication? References: Burchum, J. D., & Rosenthal, L. D. (2019). Lehne's Pharmacology for Nursing Care 10th Edition. Saunders.