12. (12 points) In a study of crime, a researcher found that 13.2% of all Americans had been victims of crime during a 1-year period. The result was based on a sample of 1, 105 US adults. a. Estimate the proportion of US adults who were victims of crime at the 95% confidence level. Interpret this confidence interval. b. Estimate the proportion at the 99% level. c. Imagine the researcher was able to double the sample size in a new sample, but finds the same 13.2% point estimate. By how much would the 95% CI shrink (i.e., become "more precise")? How much would the 99% CI shrink