A new computer virus can enter the system through email or through the internet. There is a 30 % chance of receiving this virus through email. There is a 40 % chance of receiving it through the internet. Also, the virus enters the system simultaneously through email and the internet with probability 0.15. What is the probability the virus does not enter the system at all?

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.