Answer Question 25 to Question 29 for this problem. The management of a department store is interested in estimatingtne ditlerence between the mean credit purchases of customers using the store's credit card versus those customers using a national major credit card. You are given the f information. Store's Card Major Credit Card Sample size 64 49 Sample mean $150 $130 Population standard deviation $10 $3 Question 25 Problem 4- Part a A point estimate forthe difference between the mean purchases of all users of the two credit cards is o 280 0 15 O 2 0 20 Question 26 Problem 4- Part b At 96% condence, the critical value is (round to 4 decimal places as needed) Question 27 Problem 4- Part E Al 96% condence. the margin of error is (round to two decimal places as needed. input a positive value onlyl