Implement baking and preparation time functions

exercises/concept/guidos-gorgeous-lasagna/lasagna.py

@@ -9,10 +9,11 @@
 
 
 #TODO (student): define your EXPECTED_BAKE_TIME (required) and PREPARATION_TIME (optional) constants below.
-
+EXPECTED_BAKE_TIME = 60
+PREPARATION_TIME =  2
 
 #TODO (student): Remove 'pass' and complete the 'bake_time_remaining()' function below.
-def bake_time_remaining():
+def bake_time_remaining(elapsed_bake_time):
     """Calculate the bake time remaining.
 
     Parameters:
@@ -25,19 +26,43 @@ def bake_time_remaining():
     an argument and returns how many minutes the lasagna still needs to bake
     based on the `EXPECTED_BAKE_TIME`.
     """
-
-    pass
+    return (EXPECTED_BAKE_TIME - elapsed_bake_time)
 
 
 #TODO (student): Define the 'preparation_time_in_minutes()' function below.
 # To avoid the use of magic numbers (see: https://en.wikipedia.org/wiki/Magic_number_(programming)), you should define a PREPARATION_TIME constant.
 # You can do that on the line below the 'EXPECTED_BAKE_TIME' constant.
 # This will make it easier to do calculations, and make changes to your code.
+def preparation_time_in_minutes(number_of_layers):
+    """Calculate the preparation time in minutes.
+
+    Parameters:
+        number_of_layers (int): The number of layers.
 
+    Returns:
+        int: the total minutes needs to prepare the lasagna .
 
+    Function that takes the number of the layers to make lasagna, and 
+    return the total minutes to make it`.
+    """
+    return number_of_layers * PREPARATION_TIME
 
 #TODO (student): define the 'elapsed_time_in_minutes()' function below.
+def elapsed_time_in_minutes(number_of_layers, elapsed_bake_time):
+    """Calculate the elapsed_time_in_minutes.
 
+    Parameters:
+        number_of_layers (the number of layers added to the lasagna)
+        elapsed_bake_time (the number of minutes the lasagna has spent baking in the oven already).
+
+    Returns:
+        int: the total minutes you have been in the kitchen cooking .
+
+    Function should return the total minutes you have been in the kitchen cooking — 
+    your preparation time layering + the time the lasagna has spent baking in the oven.`.
+    """
+    return number_of_layers + elapsed_bake_time
+
 
 
 # TODO (student): Remember to go back and add docstrings to all your functions