Why is the len ( ) function useful when using a loop to iterate through a stack? a. the len ( ) function will print the elements of the stack. b. the len ( ) function will run with each iteration, printing the element number each time. c. the len ( ) function will tell the program the number of elements in the stack. d. the len ( ) function will remove the duplicate elements in the stack.

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.

Explain how email technologies enable the exchange of messages between users. find out the typical parts of an email address and explain each part.

The processing of data in a computer involves the interplay between its various hardware components.