diff --git a/education/software development/ECE1400/Chapter 15 Exercises.md b/education/software development/ECE1400/Chapter 15 Exercises.md
index 222d970..0b141db 100644
--- a/education/software development/ECE1400/Chapter 15 Exercises.md	
+++ b/education/software development/ECE1400/Chapter 15 Exercises.md	
@@ -1,6 +1,11 @@
 > **1.** Section 15.1 listed several advantages of dividing a program into multiple source files.(a). Describe several other advantages
 
+- Easier to scale horizontally as developers are added to the team
+- Reduced cognitive load from less global scope to keep track of
+
 > (b). Describe some disadvantages
+- Increased complexity
+- Need to maintain/troubleshoot a build system
 
 ---
 
@@ -44,7 +49,11 @@ Macro invocations are evaluated sequentially, and so if `DEBUG` was defined afte
 ---
 
 > **5.** Suppose that a program consists of three source files - `main.c`, `f1.c`, and `f2.c`- Plus two header files, `f1.h` and `f2.h`. All three source files include `f1.h` but only `f1.c` and `f2.c` include `f2.h`. Write a makefile for this program, assuming that the compiler is `gcc` and that the executable file is to be named `demo`.
+```makefile
+demo: main.o f1.o f2.o
 
+
+```
 ---
 
 > **6.** The following questions refer to the program described in Exercise 5.
@@ -55,3 +64,4 @@ Macro invocations are evaluated sequentially, and so if `DEBUG` was defined afte
 > (c). If `f1.h` is changed after the program has been built, which files need to be recompiled?
 
 > (d). If `f2.h` is changed after the program has been built, which files need to be recompiled?
+