diff --git a/python/meltdown-mitigation/conditionals.py b/python/meltdown-mitigation/conditionals.py
index 1eb0a57..32bd5db 100644
--- a/python/meltdown-mitigation/conditionals.py
+++ b/python/meltdown-mitigation/conditionals.py
@@ -14,7 +14,7 @@ def is_criticality_balanced(temperature, neutrons_emitted):
     - The product of temperature and neutrons emitted per second is less than 500000.
     """
 
-    pass
+    return temperature < 800 and neutrons_emitted > 500 and (temperature * neutrons_emitted) < 500000
 
 
 def reactor_efficiency(voltage, current, theoretical_max_power):
@@ -37,7 +37,17 @@ def reactor_efficiency(voltage, current, theoretical_max_power):
     where generated power = voltage * current
     """
 
-    pass
+    generated_power = voltage * current
+    percentage = (generated_power / theoretical_max_power) * 100
+
+    if percentage >= 80:
+        return 'green'
+    if percentage >= 60:
+        return 'orange'
+    if percentage >= 30:
+        return 'red'
+
+    return 'black'
 
 
 def fail_safe(temperature, neutrons_produced_per_second, threshold):
@@ -53,4 +63,13 @@ def fail_safe(temperature, neutrons_produced_per_second, threshold):
     3. 'DANGER' -> `temperature * neutrons per second` is not in the above-stated ranges
     """
 
-    pass
+    low_threshold = 90/100 * threshold
+    high_threshold = ((10/100)+(100/100)) * threshold
+    value = temperature * neutrons_produced_per_second
+
+    if value <= low_threshold:
+        return 'LOW'
+    if value >= low_threshold and value <= high_threshold:
+        return 'NORMAL'
+
+    return 'DANGER'