Example: (dEtermine the number of permutations of (1, 2, 3, 4, 5, 6, 7, 8, 9 in which no odd integer is in its natural position and all even integers are in their natural position. (2) Determine the number of permutations of 1, 2, 3, 4, 5, 6, 7, 8, 9 in which four integers are in their natural position.▪ Example:(1)Determine the number of permutations of {1,2,3,4,5,6,7,8,9} in which no odd integer is in its natural position and all even integers are in their natural position. ▪ (2) Determine the number of permutations of {1,2,3,4,5,6,7,8,9} in which four integers are in their natural position