Write a function "letterCount" that receives two string s1and s2. The first string (s1) is a full sentence and the second string(s2) is a word. The function checks the sentence(s1) for each letter in the word(s2). For each letter in the word, it prints out the frequency of occurrence of that letter in the sentence.

What did creator markus “notch" persson initially call his game

Suppose there is a relation r(a, b, c) with a b+-tree index with search keys (a, b).1. what is the worst-case cost of finding records satisfying 10 < a < 50 using this index, in terms of the number of records n1, retrieved and the height h of the tree? 2. what is the worst-case cost of finding records satisfying 10 < a < 50 and 5 < b < 10 using this index, in terms of the number of records n2 that satisfy this selection, as well as n1 and h defined above? 3. under what conditions on n1 and n2, would the index be an efficient way of finding records satisfying the condition from part (2)?

Where can page numbers appear? check all that apply. in the header inside tables in the footer at the bottom of columns at the top of columns