diff --git a/problems/LabFour_ChapterEleven.h b/problems/LabFour_ChapterEleven.h
index 7098140d15b8026e0ba7d7903bddf018f395a038..240d4a94f0f7b44f4cf06e13dca852a76c055f95 100644
--- a/problems/LabFour_ChapterEleven.h
+++ b/problems/LabFour_ChapterEleven.h
@@ -13,10 +13,13 @@ using namespace std;
  * Two approaches are different if and only if they differ in the
  * number of at least one denomination of bills.  So $8 = $1+$2+$5
  * is the same as $8 = $5+$2+1, but different from $5 + 3*$1.
+ * 
+ * You may use a helper function so long as you solver the problem in a recursive manner.
  *
  * @param dollars The amount of dollars to exchange
  * @return the number of different ways of generating [dollars]
  *    dollars with the permitted bills
+ * 
  *
  * @example labFour_pTwo_exchange(8) = 7 corresponding to the
  *   following ways to exchange $8:
diff --git a/problems/LabFour_ChapterTen.h b/problems/LabFour_ChapterTen.h
index a76811e0c7b3d85d4135793c9b7f1af6c3d38fa0..03701d3a1feb512aa970e6826de90f933dbc3c3e 100644
--- a/problems/LabFour_ChapterTen.h
+++ b/problems/LabFour_ChapterTen.h
@@ -16,8 +16,20 @@ using namespace std;
  * 2. labFour_pZero_Instructor derives from labFour_pZero_Person and has
  *    a salary.
  * Complete the class definitions and implementations, including constructors,
- * destructors, and an external override of stream operator<< and operator>>
+ * destructors, setters, getters, and an external override of stream operator<< and operator>>
  * to input and output each object.
+ * 
+ * When overloading the ostream operators, the output should be formatted such that it includes all fields of the object.
+ * @example
+ * labFour_pZero_Person James("James");
+ * Jim.setBirthday("2010-02-28"); 
+ * cout << James; // outputs "James, 2010-02-28"
+ * 
+ * When overloading the instream operators, the input should be formatted such that it includes all fields of the object.
+ * @example
+ * labFour_pZero_Person James;
+ * std::stringstream input("James, 2010-02-28");
+ * input >> James; // inputs "James, 2010-02-28"
  *
  * @example
  * labFour_pZero_Person Jim("James");
@@ -39,7 +51,7 @@ class labFour_pZero_Instructor;
  * * labFour_pOne_Rectangle - a concrete class representing a rectangle
  * * labFour_pOne_Square - a concrete class representing a square
  * * labFour_pOne_Rhombus - a concrete class representing a rhombus
- * * labFour_pOne_Circle - a concrete class representing a cicle
+ * * labFour_pOne_Circle - a concrete class representing a circle
  * FEEL FREE to modify the inheritance structure, as you see fit.
  *
  * EACH concrete class must at least have methods with the signatures noted below