diff --git a/__pycache__/system_check.cpython-310.pyc b/__pycache__/system_check.cpython-310.pyc
new file mode 100644
index 0000000..f1d75cf
Binary files /dev/null and b/__pycache__/system_check.cpython-310.pyc differ
diff --git a/system_check.py b/system_check.py
index 6c19688..027bcc4 100644
--- a/system_check.py
+++ b/system_check.py
@@ -1,3 +1,4 @@
+import re
 # ==========================================
 # SECTION A: DATA PARSING (FLIGHT TICKET SYSTEM)
 # ==========================================
@@ -18,7 +19,11 @@ def get_departure_airport(ticket_string: str):
     Flight Number (JO234) can vary in length. You must find it relative to the hyphens.
     """
     # TODO: Write your code here
-    pass
+    #my_string = ticket_string[-10:-12]
+    my_list = []
+    for i in ticket_string:
+        if 
+    return 
 
 def check_baggage_allowance(ticket_string: str):
     """
@@ -36,7 +41,14 @@ def check_baggage_allowance(ticket_string: str):
     - For any other code: return "Standard - 0kg"
     """
     # TODO: Write your code here
-    pass
+    if ticket_string[0:2] == "EC":
+        return f"Economy - 20kg"
+    elif ticket_string[0:2] == "BS":
+        return f"Business - 40kg"
+    elif ticket_string[0:2] == "FL":
+        return f"First Class - 60kg"
+    else:
+        return f"Standard - 0kg"
 
 def validate_flight_number(ticket_string: str):
     """
@@ -50,7 +62,8 @@ def validate_flight_number(ticket_string: str):
     - If the numeric part cannot be converted to a number, return "Invalid Flight"
     """
     # TODO: Write your code here
-    pass
+    #re.search(r"", ticket_string)
+
 
 
 # ==========================================
@@ -72,8 +85,15 @@ def is_leap_year(year: int):
     Return True or False (Boolean).
     """
     # TODO: Write your code here
-    pass
-
+    if year % 4 == 0:
+        if year % 100 == 0:
+            if year % 400 == 0:
+                return True
+            else:
+                return False
+        else:
+            return True
+    return False
 
 # ==========================================
 # SECTION C: COMPLEX LOGIC & TDD
@@ -105,4 +125,13 @@ def reactor_status(temp: int, radiation: int):
        - For all other cases: return "Normal Operation"
     """
     # TODO: Write your code here
-    pass
+    if temp < 0 or radiation < 0:
+        return f"Sensor Error"
+    elif temp > 2000 or radiation > 500:
+        return f"CRITICAL"
+    elif (1000 <= temp <= 2000) and radiation > 100:
+        return f" WARNING"
+    elif temp < 500:
+        return f"Maintenance Mode"
+    else:
+        return f"Normal Operation"
diff --git a/test_reactor.py b/test_reactor.py
new file mode 100644
index 0000000..0ea46c4
--- /dev/null
+++ b/test_reactor.py
@@ -0,0 +1,13 @@
+import unittest
+from system_check import reactor_status
+
+class testReactor(unittest.TestCase):
+    def test_reactor(self):
+        self.assertEqual(reactor_status(-1, 5), "Sensor Error")
+        self.assertEqual(reactor_status(3000, 600), "CRITICAL")
+        self.assertEqual(reactor_status(1400, 150), "WARNING")
+        self.assertEqual(reactor_status(400, 80), "Maintenance Mode")
+        self.assertEqual(reactor_status(700, 80), "Normal Operation")
+
+if __name__ == "__main__":
+    unittest.main()
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