9) (10 points) Fox Mulder and Dana Scully have been assigned to investigate an FBI X-File in Cheney, Texas, a small town with population 1469 . Scully wants to ascertain the proportion of residents who have been turned into Vampires with an error of no more than 10% and a 90% confidence interval. How many residents should Scully test? Show your work or specify your calculator inputs for full credit