Older people often have a hard time finding work. AARP reported on the number of weeks it takes a worker aged 55 plus to find a job. The data on number of weeks spent searching for a job contained in the file JobSearch are consistent with the AARP findings. a. Provide a point estimate of the population mean number of weeks it takes a worker aged 55 plus to find a job. b. At 95% confidence, what is the margin of error