(1) Time on Facebook: Typical users of Facebook spend some time each day on Facebook. A sample of 50 Facebook users finds an average time per day on Facebook of 35 minutes with a standard deviation of 4.5. Give a best estimate for the time spent per day on Facebook, a margin of error for this estimate (with 95% confidence), and a 95% confidence interval. Interpret the confidence interval in context. What do we have to assume about the sample in order to have confidence in our estimate? (2) Pollution: Carbon monoxide (CO) emissions for passenger cars has a mean of 9.4 g/mi. A company believes that its fleet of cars has CO emissions that differs from the national mean. They collect a random sample of 40 cars and find a mean of ) = 8.9 with a standard deviation of 1.2. Assuming that the underlying distribution is relatively normal, at the 1% level of significance, does his sample provide evidence to support the company's claim