Write a program to check if an input is a valid hashtag(starts with #, contains only letters, numbers, and underscore, no space or special characters).1)Name your program hashtag. c.2)The user input ends with the user pressing the enter key (a new line character).3)Library function isalpha(), isdigit(), and isalnum()arenot allowed inthis program.4)Use getchar() to read in the input.

Provide an example of a project that combines the three principles of lean six sigma with business project management (bpm) and services oriented architecture (soa). identify the elements of the project that comply with each of three principles.

The two main ways in which marketers address the competition with their strategies are by satisfying a need better than a competition and by

Write a modular program (no classes yet, just from what you learned last year), that allows two players to play a game of tic-tac-toe. use a two-dimensional char array with 3 rows and 3 columns as the game board. each element of the array should be initialized with an asterisk (*). the program should display the initial board configuration and then start a loop that does the following: allow player 1 to select a location on the board for an x by entering a row and column number. then redisplay the board with an x replacing the * in the chosen location. if there is no winner yet and the board is not yet full, allow player 2 to select a location on the board for an o by entering a row and column number. then redisplay the board with an o replacing the * in the chosen location. the loop should continue until a player has won or a tie has occurred, then display a message indicating who won, or reporting that a tie occurred. player 1 wins when there are three xs in a row, a column, or a diagonal on the game board. player 2 wins when there are three ox in a row, a column, or a diagonal on the game board. a tie occurs when all of the locations on the board are full, but there is no winner. input validation: only allow legal moves to be entered. the row must be 1, 2, or 3. the column must be 1, 2 3. the (row, column) position entered must currently be empty (i.e., still have an asterisk in it).