diff --git a/about_lists.py b/about_lists.py
index 58b8331..33b1302 100644
--- a/about_lists.py
+++ b/about_lists.py
@@ -1,16 +1,33 @@
 # Task 1. Create a list containing squares for number from 1 up to 10.
 # Use list comprehension
+lis=[(i+1)**2 for i in range(10)]
+
+print(lis)
 
 # Task 2. Create a list containig numbers leap years in the future from 2000 up to 2100
 # Use list comprehension with if condition
 # Hint: leap year is a year divisible by 4, but not by 100, unless it is divisible by 400
 
 def is_leap(year):
-    return True
+    if year%4 == 0:
+        if year%400 == 0:          
+            return True
+        elif year%100 == 0:
+            return False
+        else:
+            return True
+    else:
+        return False
+
+leap_years=[i for i in range(2000,2101) if is_leap(i)]
+
+print(leap_years)
 
 
 # Task 3. You are given a dictionary with vehicles and their weights:
 vehicles = {'sedan': 1550, 'Pickup': 2000, 'bicycle': 20, 'TRUCK': 7000, 'motorcycle': 200, 'Minivan': 1700, 'SUV': 2500, 'van': 3500, 'Semi': 12000, 'Bus': 3000}
 
-# With single list comprehension select vehicle those weight is below 5000 kg
-# Convert names to upper-case within same list comprehension
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+# Withff single list comprehension select vehicle those weight is below 5000 kg
+
+liss = [i.upper() for i,j in vehicles.items() if j <5000]
+print(liss)
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