diff --git a/Sprint-1/destructuring/exercise-1/exercise.js b/Sprint-1/destructuring/exercise-1/exercise.js
index 1ff2ac5c..d86bc7bf 100644
--- a/Sprint-1/destructuring/exercise-1/exercise.js
+++ b/Sprint-1/destructuring/exercise-1/exercise.js
@@ -6,7 +6,7 @@ const personOne = {
 
 // Update the parameter to this function to make it work.
 // Don't change anything else.
-function introduceYourself(___________________________) {
+function introduceYourself({ name, age, favouriteFood }) {
   console.log(
     `Hello, my name is ${name}. I am ${age} years old and my favourite food is ${favouriteFood}.`
   );
diff --git a/Sprint-1/destructuring/exercise-2/exercise.js b/Sprint-1/destructuring/exercise-2/exercise.js
index e11b75eb..3f992951 100644
--- a/Sprint-1/destructuring/exercise-2/exercise.js
+++ b/Sprint-1/destructuring/exercise-2/exercise.js
@@ -70,3 +70,22 @@ let hogwarts = [
     occupation: "Teacher",
   },
 ];
+/* Task 1 */
+function houseGryffindorNames(array) {
+  array.forEach(({ firstName, lastName, house }) => {
+    if (house === "Gryffindor") {
+      console.log(firstName, lastName);
+    }
+  });
+}
+houseGryffindorNames(hogwarts);
+
+/* Task 2 */
+function teachersPetNames(array) {
+  array.forEach(({ firstName, lastName, occupation, pet }) => {
+    if (occupation === "Teacher" && pet !== null) {
+      console.log(firstName, lastName);
+    }
+  });
+}
+teachersPetNames(hogwarts);
diff --git a/Sprint-1/destructuring/exercise-3/exercise.js b/Sprint-1/destructuring/exercise-3/exercise.js
index b3a36f4e..d299e5d1 100644
--- a/Sprint-1/destructuring/exercise-3/exercise.js
+++ b/Sprint-1/destructuring/exercise-3/exercise.js
@@ -6,3 +6,20 @@ let order = [
   { itemName: "Hot Coffee", quantity: 2, unitPricePence: 100 },
   { itemName: "Hash Brown", quantity: 4, unitPricePence: 40 },
 ];
+
+function takeOutOrder(order) {
+  let totalSum = 0;
+
+  console.log("OTY       ITEM             TOTAL");
+  order.forEach(({ quantity, itemName, unitPricePence }) => {
+    const itemTotal = (quantity * unitPricePence) / 100;
+    totalSum += itemTotal;
+
+    console.log(
+      `${quantity}       ${itemName.padEnd(18)} ${itemTotal.toFixed(2)}`
+    );
+  });
+
+  console.log(`\nTotal: ${totalSum.toFixed(2)}`);
+}
+takeOutOrder(order);
diff --git a/debugging/book-library/script.js b/debugging/book-library/script.js
index 75ce6c1d..8a45d9fb 100644
--- a/debugging/book-library/script.js
+++ b/debugging/book-library/script.js
@@ -16,7 +16,6 @@ function populateStorage() {
     );
     myLibrary.push(book1);
     myLibrary.push(book2);
-    render();
   }
 }
 
@@ -29,17 +28,20 @@ const check = document.getElementById("check");
 //via Book function and start render function
 function submit() {
   if (
-    title.value == null ||
-    title.value == "" ||
-    pages.value == null ||
-    pages.value == ""
+    title.value.trim() === "" ||
+    author.value.trim() === "" ||
+    pages.value.trim() === ""
   ) {
     alert("Please fill all fields!");
     return false;
   } else {
-    let book = new Book(title.value, title.value, pages.value, check.checked);
-    library.push(book);
+    let book = new Book(title.value, author.value, pages.value, check.checked);
+    myLibrary.push(book);
     render();
+    title.value = "";
+    author.value = "";
+    pages.value = "";
+    check.checked = false;
   }
 }
 
@@ -54,7 +56,7 @@ function render() {
   let table = document.getElementById("display");
   let rowsNumber = table.rows.length;
   //delete old table
-  for (let n = rowsNumber - 1; n > 0; n-- {
+  for (let n = rowsNumber - 1; n > 0; n--) {
     table.deleteRow(n);
   }
   //insert updated row and cells
@@ -72,15 +74,9 @@ function render() {
 
     //add and wait for action for read/unread button
     let changeBut = document.createElement("button");
-    changeBut.id = i;
     changeBut.className = "btn btn-success";
     wasReadCell.appendChild(changeBut);
-    let readStatus = "";
-    if (myLibrary[i].check == false) {
-      readStatus = "Yes";
-    } else {
-      readStatus = "No";
-    }
+    let readStatus = myLibrary[i].check ? "Yes" : "No";
     changeBut.innerText = readStatus;
 
     changeBut.addEventListener("click", function () {
@@ -90,11 +86,10 @@ function render() {
 
     //add delete button to every row and render again
     let delButton = document.createElement("button");
-    delBut.id = i + 5;
-    deleteCell.appendChild(delBut);
-    delBut.className = "btn btn-warning";
-    delBut.innerHTML = "Delete";
-    delBut.addEventListener("clicks", function () {
+    deleteCell.appendChild(delButton);
+    delButton.className = "btn btn-warning";
+    delButton.innerHTML = "Delete";
+    delButton.addEventListener("click", function () {
       alert(`You've deleted title: ${myLibrary[i].title}`);
       myLibrary.splice(i, 1);
       render();