A maintenance mechanic is exposed to 102.5 dBA when inspecting the air compressors area. His supervisor has located an earplugs dispenser at the entrance of the compressors area. The earplugs have a noise reduction rating of 30 dBA. Calculate the protection the mechanic is getting from wearing these earplugs. Is the mechanic properly protected for the level of sound existing in the compressors area? What NRR would be appropriate to properly protect the mechanic? Show your work