Once you have modified your database, you must then populate it with data using your insert into statements; however, you will need to modify your insert into statements for your product entity since it no longer has the unitprice attribute. after populating all of the other tables in your improved database, you will then need to populate the price_history entity by using insert into statements. use the previous unit price value with price valid from 1/1/2017 until 3/31/2017. then from 4/1/2017 until 5/20/2017, increase each unit price by 4% from the previous price. then from 5/21/2017 until 5/29/2017, increase each unit price by 5% from the previous price. then from 5/30/2017 until 7/07/2017 decrease each unit price by 10% from the previous price. then from 7/08/2017 until 11/25/2017, increase each unit price by 10% from the previous price. then from 11/26/2017 until 12/31/2018, increase each unit price by 4% from the previous price. populate your tables with the correct data.

3. bob is arguing that if you use output feedback (ofb) mode twice in a row to encrypt a long message, m, using the same key each time, it will be more secure. explain why bob is wrong, no matter what encryption algorithm he is using for block encryption (15 points).

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).

Amanda needs to create an informative print brochure for her local library’s fundraiser dinner. what critical detail must she have before she starts designing the brochure?