Let S = (1, 2, 3, 4, 5} (a) how many permutations Does S have? How many 4-permutations Does S have? How many 4- permutations with rehearsal has S? (b)How many subsets Does S have? How many 4-combinations Does S have? (c) What lexicographic rank does the permutation (4, 1, 3, 2, 5) have? (d) which permutation of S has lexicographic rank 75? (e) what lexicographic rank does the 3-permutation (3, 5, 2) of S have? (f) what lexicographic rank has 3 - the permutation with repetition (3,5,2) of S? (g) which 4-permutation with repetition of S has the lexicographic rank 100? (h) List in lexicographic order the first four 3-combinations of S?