Some states now allow online gambling. As a marketing manager for a casino. you need to determine the percentage ofadults in those states who gamble online. How many adults must you survey in order to be 95% confident that your estimate is in error by no more than four percentage points? Complete parts (a) and (b) below. :1. Assume that nothing is known about the percentage of adults who gamble online. n=g (Round up to the nearest integer.) b. Assume that 19% of all adults gamble online. n = (Round up to the nearest integer.)