diff --git a/src/task_1/index.js b/src/task_1/index.js
index 966f6fc..f0a862e 100644
--- a/src/task_1/index.js
+++ b/src/task_1/index.js
@@ -19,7 +19,30 @@
 @param {string} email Электронная почта
 @returns {boolean} Результат добавления
  */
-function add(phoneBook, phone, name, email) {
+function add(phoneBook, phone, name, email){
+	const correctContact2 = correctContact(phone);
+	if (!name || correctContact2 === null){
+		return false;
+	}
+
+	for (let item of phoneBook){
+		if (item.phone === correctContact2 && item !== undefined){
+			return false;
+		}
+	}
+	phoneBook.push({ phone: correctContact2, name, email });
+	return true;
+}
+function correctContact(phone){
+	if (phone.match(/\+\d{11}/) !== null){
+		return phone;
+	} 
+	else if (phone.match(/\+\d-\d{3}-\d{3}-\d{2}-\d{2}/) !== null){
+		return phone.replace(/-/g, '');
+	} 
+	else{
+		return null;
+	}
 }
 
 module.exports.add = add;
diff --git a/src/task_2/index.js b/src/task_2/index.js
index a5ad6b9..be5bd68 100644
--- a/src/task_2/index.js
+++ b/src/task_2/index.js
@@ -19,6 +19,19 @@
 @returns {boolean} Результат обновления
  */
 function update(phoneBook, phone, name, email) {
+	for (let phones of phoneBook){
+		if (phones.phone.replace(/-/g, "") == phone.replace(/-/g, "")){
+			phones.name = name;
+			if (email instanceof String) 
+				phones.email = email;
+
+			return true;
+		}
+	} 
+	if (phone.search(/^\+\d-\d{3}-\d{3}-\d{2}-\d{2}$|^\+\d{11}$/) == -1
+		|| !name) return false;
+
+	return false;
 }
 
 module.exports.update = update;
diff --git a/src/task_3/index.js b/src/task_3/index.js
index 67fd3cf..6dd6273 100644
--- a/src/task_3/index.js
+++ b/src/task_3/index.js
@@ -18,7 +18,38 @@
 @param {string} query Строка для поиска
 @returns {Array<string>} Результаты поиска
  */
-function find(phoneBook, query) {
+function find(phoneBook, query) 
+{
+	let massiv = [];
+	if (query === '*') 
+	{
+		phoneBook.forEach(element => {massiv.push(correct(element.phone, element.name, element.email));});
+		return massiv;
+	}
+	phoneBook.forEach(element => {
+		if (element !== undefined) 
+		{
+			if (element.email.includes(query) && element.email !== undefined) 
+			{
+				massiv.push(correct(element.phone, element.name, element.email));
+			}
+			if (element.phone.includes(query.replace(/-/g, '')) || element.name.includes(query)) 
+			{
+				massiv.push(correct(element.phone, element.name, element.email));
+			}
+		}
+	});
+	return massiv;
+}
+
+function correct(phone, name, email) 
+{
+	const formattedPhone = `${phone.slice(0, 2)} (${phone.slice(2, 5)}) ${phone.slice(5, 8)}-${phone.slice(8, 10)}-${phone.slice(10, 12)}`;
+	if (email === undefined) 
+	{
+		return `${name} ${formattedPhone}`;
+	}
+	return `${name} ${formattedPhone} ${email}`;
 }
 
 module.exports.find = find;
diff --git a/src/task_4/index.js b/src/task_4/index.js
index c769ecd..7d5d663 100644
--- a/src/task_4/index.js
+++ b/src/task_4/index.js
@@ -13,6 +13,28 @@
 @returns {number} Количество удаленных записей
  */
 function findAndRemove(phoneBook, query) {
+	let deletedPhones = 0;
+	if (query === '*') {
+		for (let i in phoneBook) {
+			delete phoneBook[i];
+			deletedPhones++;
+		}
+		return deletedPhones;
+	}
+	for (let i in phoneBook) {
+		if (phoneBook[i] !== undefined) {
+			if (phoneBook[i].email !== undefined && phoneBook[i].email.includes(query)) {
+				delete phoneBook[i];
+				deletedPhones++;
+			}
+			if (phoneBook[i].name.includes(query) || phoneBook[i].phone.includes(query.replace(/-/g, ''))) {
+				delete phoneBook[i];
+				deletedPhones++;
+				continue;
+			}
+		}
+	}
+	return deletedPhones;
 }
 
 module.exports.findAndRemove = findAndRemove;