diff --git a/js/functions.js b/js/functions.js
index 72ee420..16c4846 100644
--- a/js/functions.js
+++ b/js/functions.js
@@ -1,29 +1,24 @@
-//Задача №1. Функция для проверки длины строки.
-function checkStringLength(string, maxLength) {
-  return string.length <= maxLength;
-}
+//5.16. Функции возвращаются
 
-//Задача №2. Функция для проверки, является ли строка палиндромом.
-function checkPalindrome(string) {
-  const formattedString = string.replaceAll(' ', '').toLowerCase();
+function checkMeetingTimeframe (startWorkingDay, endWorkingDay, beginningMeeting, durationMeeting) {
+  const startWorkingDayInMinutes = convertToMinutes(startWorkingDay);
+  const endWorkingDayInMinutes = convertToMinutes(endWorkingDay);
+  const beginningMeetingInMinutes = convertToMinutes(beginningMeeting);
 
-  let reverseString = '';
-  for (let i = formattedString.length - 1; i >= 0; i--) {
-    reverseString += formattedString[i];
-  }
-  return reverseString === formattedString;
-}
+  const isMeetingAfterWorkStart = startWorkingDayInMinutes <= beginningMeetingInMinutes;
+  const isMeetingBeforeWorkEnd = (beginningMeetingInMinutes + durationMeeting) <= endWorkingDayInMinutes;
 
-//Задача №3. Извлечение цифр из строк.
-function parseToPositiveInt(string) {
-  const stringForloop = string.toString();
+  return isMeetingAfterWorkStart && isMeetingBeforeWorkEnd;
+}
 
-  let formattedString = '';
-  for (let i = 0; i < stringForloop.length; i++) {
-    if (!isNaN(parseInt(stringForloop[i], 10))) {
-      formattedString += stringForloop[i];
-    }
-  }
+function convertToMinutes(inputValue) {
+  const [hours, minutes] = inputValue.split(':');
 
-  return formattedString !== '' ? +formattedString : NaN;
+  return (Number(hours) * 60) + Number(minutes);
 }
+
+console.log(checkMeetingTimeframe('08:00', '17:30', '14:00', 90));
+console.log(checkMeetingTimeframe('8:0', '10:0', '8:0', 120));
+console.log(checkMeetingTimeframe('08:00', '14:30', '14:00', 90));
+console.log(checkMeetingTimeframe('14:00', '17:30', '08:0', 90));
+console.log(checkMeetingTimeframe('8:00', '17:30', '08:00', 900));
\ No newline at end of file