The Feistel cipher is a symmetric block cipher encryption framework which is the basis of many modern day encryption algorithms. In this coursework you will implement a Feistel cipher system as a hardware component and as a software implementation. In a Feistel cipher the plaintext, P, to be encrypted is split into two equal size parts Lo and Ro such that P = L,Ro- A function F is applied to one half of the plaintext, combined with a key, and the result is XOR'd with the other half of the plaintext. Feistel ciphers often employ multiple rounds of this scheme. In general the scheme works as follows, for all i =0, . ..,n, L+1 = R, R+1 = L, © F(R,, K,) To decrypt an encrypted message using this cipher we can apply the same procedure in reverse. For i = n, n –1, . ,0, R, = L,+1 L, = R,-1 © F(L+1, K.) For this coursework we are interested in the 16-bit Feistel cipher which uses 4 rounds. The function F(A, B) = A€B. The keys are derived from a single 8-bit key Ko such that, Ko = b,bgb;b,b3b2b, bo K1 = bøbzbab3b2b,bob- K2 = b;b,b3b>b,bob-bs K3 = b,bzb2b,bobrbebs

Can you please answer the following question? The program is JavaScript and needs to look exactly like the example attached. Thanks!

Please Help with Java Script eventListeners 1. Add an event listener to the button with an id of "button1". Listen for the click event. The button should change the text content of the paragraph with an id of "p1" to:"Hello World! I'm listening to events." This did NOT work://const button1 = document.querySelector("button1");//const p1 = document.querySelector("p1");//const click = () => {// alert("Hello World! I'm Listening to events.");//} //button1.addEventListener("click", p1, false); This did NOT workconst button1 = document.querySelector("button1");const p1 = button1.querySelector("p1");button1.addEventListener("click", function (event) {event.p1.target.textContent = "Hello World! I'm Listing to events.";}); 2) Add an event listener to the button with an idof "button2". Listen for the click event. Thebutton should change the text content of theparagraph with an id of "p2" to:"This button toggles text content."If the button is clicked a 2nd time,the text content should change…

Thank you! This worked. The final thing is, I need the data from the itemPrice and itemName submitted in the code to go into a textbox called "txtPriceName". I do not know how else to edit it further for it to do this.

In what situations is it helpful to have data stored in an array with several dimensions?