Question 3: [20 points] Implement a class named MyArrayList that extends the java. util. ArrayList by overriding the add method in the following way: it does nothing if the object to be added already exists in the collection; otherwise it calls the add method in the super class to add the object into the collection. Use o1.equals(o2) to test if two objects o1 and o2 are equal.

To produce a starlight effect in her photograph, lina should choose the filter for her camera.

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)?

What is the best assassins creed game?