.Low-power wide area networks (LPWAN) have both licensed and unlicensed spectral versions available for Internet of Things (IoT) applications. Based on what you have learnt in Block 3, Parts 3 and 4, write a short comparison of the key features of the LPWAN unlicensed and licensed spectrum versions for IoT applications. Your comparison should include a brief discussion on the following: the different infrastructures that each uses the relative costs of each version their respective interference levels. The maximum word limit is 300 words and your answer must be a narrative NOT a comparative table or set of bullet points.