Brute force password guessing. Each of the following is a di↵erent kind of password. An attacker can always try to bypass password security by guessing every possible password that might exist. In the worst case (for the attacker), the correct password is the last one that they guess. So increasing the number of potential passwords makes password protection more e↵ective. For each password type, compute the number of passwords of that type that exist. Justify your answers (show your work). (c) Eight lower-case letters, upper-case letters, or digits. (d) Nine letters.

Give definitions for three distinct functions g1(n),g2(n), and g3(n) that are members of the set O(n3).

Which two editions of windows 7 support 64 bit cpus? choose two out of professional, business, starter, or home premium.

Complete the sentence about a presentation delivery method

Design a class tictactoe that: holds the following information about the game: two-dimensional array (3 by 3), and winner. add additional variables as needed. includes the functions to perform the various operations on objects. for example, function to print the board, getting the move, checking if move is valid, determining if there is a winner after each move. add additional operations as needed. includes constructor(s). write the functions of the class, and write a program that uses the class. the program should declare an object of type tictactoe. the program will create the board and store it in the array. the program will allow two players to play the tic-tac-toe game. after every valid move update the array, check if there is a winner. if there is no winner and no tie, then print the board again to continue.