A national poll found that 511 out of 950 people thought that possession of small amounts of illicit drugs (narcotics) should be decriminalized.

a) Determine the margin of error at a 99% confidence interval b) Determine the 99% confidence interval for the proportion of Canadians who support decriminalization of possession of small amounts of narcotics. c) Use your answers from a) and b) to summarize results by completing the statement shown below:

Later, a similar poll to the one in the previous question was done at a 95% confidence level. It was concluded that 48% of Canadians think that possession of small amounts of narcotics should be decriminalized, and this would be correct within 4.0%, 19 times out of 20. How many Canadians were polled?