Define and describe the significance of a DEA number: Why and when is it necessary for the NP to have a DEA number? How does an NP obtain a DEA number? What is the cost?Each group will answer the assigned question in 1-2 pages. Please include the question number in your answer.Answers can be found on the Board of Registered Nursing website: http://www.rn.ca.gov (Links to an external site.)Links to an external site. or other credible sources.