Noise Level: A social scientist found that the percent (P) of people who are “highly annoyed” by noise from household appliances, traffic, airports, and so on depend on the decibel level (L) of the noise. The following function is used to find the noise level: P(L)=0.8553L-0.0401L2 +0.0047L3 A vacuum cleaner makes noise of approximately 80 decibels. Part A: What percent of people are highly annoyed by a noise level of 80 decibels? Part B: What percent of people are highly annoyed by a noise level of 0 decibels? What does this tell you about the graph of this polynomial?