With necessary examples, briefly explain the two types of ordered indices namely dense and sparse indices Suppose that we are using static hashing on a file that contains records with the following search-key values: . 10, 4, 5, 7, 12, 17, 20, 23, 29, 31, 28, 15 Give the static hash structure for this file if the hash function is h(x) x mod 8 and buckets can hold three records. Also, show how the static hash structure changes as the result of each of the following steps a Insert 13 b. Insert 21. d. Delete 28 e. Delete 23. 3M