diff --git a/for_challenges.py b/for_challenges.py
index 997754da..53842771 100644
--- a/for_challenges.py
+++ b/for_challenges.py
@@ -2,6 +2,7 @@
 # Необходимо вывести имена всех учеников из списка с новой строки
 
 names = ['Оля', 'Петя', 'Вася', 'Маша']
+print('\n'.join(names))
 # ???
 
 
@@ -12,7 +13,8 @@
 # Петя: 4
 
 names = ['Оля', 'Петя', 'Вася', 'Маша']
-# ???
+for name in names:
+    print(f"{name}: {len(name)}")
 
 
 # Задание 3
@@ -25,6 +27,12 @@
     'Маша': False,
 }
 names = ['Оля', 'Петя', 'Вася', 'Маша']
+for name in names:
+    if name in is_male:
+#        print(name)
+        gender = "М" if is_male[name] else "Ж"
+        print(f"{name}: {gender}")
+    
 # ???
 
 
@@ -40,6 +48,13 @@
     ['Вася', 'Маша', 'Саша', 'Женя'],
     ['Оля', 'Петя', 'Гриша'],
 ]
+
+count_groups = len(groups)
+print(f"Всего {count_groups} группы")
+
+for group_number,group in enumerate(groups, start = 1):
+    count_students = len(group)
+    print(f"Группа {group_number}: {count_students} ученика")
 # ???
 
 
@@ -54,4 +69,8 @@
     ['Оля', 'Петя', 'Гриша'],
     ['Вася', 'Маша', 'Саша', 'Женя'],
 ]
+
+for group_number,group in enumerate(groups, start = 1):
+    students = ', '.join(group)
+    print(f"Группа {group_number}: {students}")
 # ???
\ No newline at end of file
diff --git a/for_dict_challenges.py b/for_dict_challenges.py
index fd86d344..a1e179ae 100644
--- a/for_dict_challenges.py
+++ b/for_dict_challenges.py
@@ -12,7 +12,18 @@
     {'first_name': 'Маша'},
     {'first_name': 'Петя'},
 ]
-# ???
+
+names = dict()
+
+for student in students:
+    if student['first_name'] not in names.keys():
+        names[student['first_name']] = 1
+    else:
+        names[student['first_name']] += 1
+
+for name, count in names.items():
+    print(f"{name}:{count}")
+    # ???
 
 
 # Задание 2
@@ -26,6 +37,22 @@
     {'first_name': 'Маша'},
     {'first_name': 'Оля'},
 ]
+names = dict()
+
+for student in students:
+    if student['first_name'] not in names.keys():
+        names[student['first_name']] = 1
+    else:
+        names[student['first_name']] += 1
+
+frequent_name = None
+name_count = 0
+
+for name, count in names.items():
+    if count > name_count:
+        name_count = count
+        frequent_name = name
+print(f"Самое частое имя: {frequent_name}")
 # ???
 
 
@@ -51,6 +78,16 @@
         {'first_name': 'Саша'},
     ],
 ]
+
+from collections import Counter
+
+class_num = 1
+for item in school_students:
+    temp = [name['first_name'] for name in item]
+    count = Counter(temp)
+    print(f'Самое частое имя в классе {class_num}: {count.most_common()[0][0]}')
+    class_num += 1
+
 # ???
 
 
@@ -72,6 +109,25 @@
     'Миша': True,
     'Даша': False,
 }
+
+print(school[0], type(school[0]))
+
+for class_info in school:
+    class_name = class_info['class']
+    students = class_info['students']
+
+    boys = 0
+    girls = 0
+
+    for student in students:
+            name = student['first_name']
+            if is_male.get(name):
+                boys +=1
+            else:
+                girls +=1
+
+print(f'Класс {class_name}: девочки {girls}, мальчики {boys}')
+
 # ???
 
 
diff --git a/string_challenges.py b/string_challenges.py
index 856add2d..99553266 100644
--- a/string_challenges.py
+++ b/string_challenges.py
@@ -1,28 +1,51 @@
 # Вывести последнюю букву в слове
 word = 'Архангельск'
+last = word[-1]
+print(last)
 # ???
 
 
 # Вывести количество букв "а" в слове
 word = 'Архангельск'
+a= word.lower()
+print(a.count('а'))
 # ???
 
 
 # Вывести количество гласных букв в слове
 word = 'Архангельск'
+vowels = "аеёиоуыэюяАЕЁОИУЫЭЮЯ"
+count_vow = 0
+for letter in word.lower():
+    if letter in vowels:
+        count_vow += 1
+
+print(count_vow)
+
 # ???
 
 
 # Вывести количество слов в предложении
 sentence = 'Мы приехали в гости'
+words = sentence.split()
+num_words = len(words)
+print(num_words)
 # ???
 
 
 # Вывести первую букву каждого слова на отдельной строке
 sentence = 'Мы приехали в гости'
+words = sentence.split()
+for word in words:
+    print(word[0])
 # ???
 
 
 # Вывести усреднённую длину слова в предложении
 sentence = 'Мы приехали в гости'
+words = sentence.split()
+num_words = len(words)
+for word in words:
+    avg_word_len = len(sentence) / num_words
+print(f"Средняя длина слова в предложении {avg_word_len}")
 # ???
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