Exercise 11.1.2: find the next permutation in lexicographic order. about for each permutation of {1, 2, 3, 4, 5, 6, 7}, give the next largest permutation or indicate that the permutation is the last one in lexicographic order.

(a) (1, 2, 3, 4, 5, 6, 7)
(b) (7, 6, 5, 4, 3, 2, 1)
(c) (1, 7, 6, 4, 2, 3, 5)
(d) (3, 7, 6, 5, 4, 2, 1)
(e) (5, 4, 7, 6, 3, 2, 1)

3.17 scores on stats final. below are final exam scores of 20 introductory statistics students. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 57, 66, 69, 71, 72, 73, 74, 77, 78, 78, 79, 79, 81, 81, 82, 83, 83, 88, 89, 94 (a) the mean score is 77.7 points. with a standard deviation of 8.44 points. use this information to determine if the scores approximately follow the 68-95-99.7% rule. (b) do these data appear to follow a normal distribution? explain your reasoning using the graphs provided below.