Which of the following methods allows you to delete an array item based on its value?

This segment is equivalent to which of the following?

``` if (gender == 1) { if (age >= 65) { ++seniorFemales; } } ``` a. if (gender == 1 || age >= 65) { ++seniorFemales; } b. if (gender == 1 && age >= 65) { ++seniorFemales; } c. if (gender == 1 AND age >= 65) { ++seniorFemales; } d. if (gender == 1 OR age >= 65) { ++seniorFemales; }

Consider the following schema:

Book(ISBN,Title,Publisher,PublicationDate)
Author(AName,Birthdate)
Publisher(Pname,Address)
Wrote(ISBN,AName) // which author wrote which book

Use the relational algebra to express the following queries: (a) Find all book titles published by Acme Publishers (b) Find all authors of the book with ISBN 0444455551 (c) Find all authors who published at least one book with Acme Publishers (d) Find all authors who never published a book with Acme Publishers.