Please help me figure this questions out.

Guam}! Progress, February 2005, reports on improvements in customer satisfaction and loyalty made by Bank of America. A key measure of customer satisfaction is the response [on a scale from 1 to 10) to the question: "Considering all the business you do with Bank of America. what is your overall satisfaction with Bank of America?1r Here. a response of 9 or 10 represents \"customer delight." Suppose that the survey selected 490 customers. Assume that 48% of Bank of America customers would currently express customer delight. That is. assume p = .48. {a} Find the probability that the sample proportion obtained from the sample of 490 Bank ofAmerica customers would be within three percentage points of the population proportion. 'hat is. find H45 5 f? 5 .51]. [Round your answer to 4 decimal places. Do not round intermediate values. Round z-value to 2 decimal places.) Proms s {phat) s 0.51) E | {b} Find the probability that the sample proportion obtained from the sample of490 Bank ofAmerica customers would be within six percentage points of the population proportion. \"hat is. find H.412 5 f? 5 .54). {Round your answer to 4 decimal places. Do not round intermediate values. Round zwalue to 2 decimal places} mm s {la-hat) s 0.54) E |