Refactor code structure for improved readability and maintainability

context.py

@@ -44,11 +44,11 @@ page_5_context = {
     "fuel_source_chart": image_to_base64(
         "/home/oluwasanmi/Documents/Work/MKD/report_generation/graphs/fuel_source_chart.png"
     ),
-    "resting_calories": 1540,
-    "neat_calories": 310,
-    "weight_loss_calories": 1725,
+    "resting_calories": 1385,
+    "neat_calories": "null",
+    "weight_loss_calories": "null",
     "weight_loss_rate": "1lb/week",
-    "total_calories": 3575,
+    "total_calories": "null",
 }
 
 page_6_context = {
@@ -108,8 +108,8 @@ page_8_context = {
     "zone1_bpm": "81-96bpm",
     "zone2_bpm": "96-100bpm",
     "zone3_bpm": "100-178bpm",
-    "zone4_bpm": "178-188bpm",
-    "zone5_bpm": "188-198bpm",
+    "zone4_bpm": "178-189bpm",
+    "zone5_bpm": "189-199bpm",
     "zone1_speed": "3.5mph",
     "zone2_speed": "3.5-4.0mph",
     "zone3_speed": "4.0-6.5mph",