VPD Response Times to Emergencies Reach 10-Year High (Howell, 2017) The amount of time it takes Vancouver police officers to respond to an emergency call such as a robbery or a burglary in progress is increasing year over year and Police Chief Adam Palmer predicts it will not get any better until more officers are hired The average response time for an emergency call has gone from eight minutes and 33 seconds in 2008 to nine minutes and 43 seconds in 2017, That increase of more than a minute was captured by the department in data recorded between January and June of each year for the past decade. TRU Open Assume that the "priority -one response time for Vancouver police can be approximated with a normal mode. with a mean of 10 minutes and a standard deviation of 2.5 minutes,, i. What proportion of the response times are at least 8 minutes but at most 12 minutes? il. What proportion of the response times are at most 9 minutes? ili. 20% of the response times are longer than how many minutes? iv. Find the IQR of the response times. D. Suppose that another "major city" claimed that its police force response times followed a normal model with a mean of 8 minutes. What is the SD of this model if 95% of the response times were at most 12 minutes? Show all steps in your solution