diff --git a/education/software development/ECE1400/Chapter 13 Exercises.md b/education/software development/ECE1400/Chapter 13 Exercises.md
index 03deb8c..40f549a 100644
--- a/education/software development/ECE1400/Chapter 13 Exercises.md	
+++ b/education/software development/ECE1400/Chapter 13 Exercises.md	
@@ -1,4 +1,4 @@
-> 1. The following function calls supposedly write a single new-line character, but some are incorrect. Identify which calls don't work and explain why.
+> **1.** The following function calls supposedly write a single new-line character, but some are incorrect. Identify which calls don't work and explain why.
 
 b. `printf("%c", "\n");` - This is invalid because the double quotes make `\n` a string, but it's being displayed with the `%c`formatting specifier.
 c. `printf(%s, '\n');` - This is invalid because it's trying to display a `char` using the string formatting specifier.
@@ -6,8 +6,9 @@ e. `printf('\n');` - `printf`'s first argument should be a string, not a `char`.
 h. `putchar("\n");` - `putchar`'s first argument should be a `char`, not a string.
 i. `puts('\n');` - `puts`'s first argument should be a string, not a `char`.
 j. `puts("\n");` - `puts` will write a newline after writing a string, so this will write two newlines. 
+<hr>
 
-> 2. Suppose that `p` has been declared as follows:
+> **2.** Suppose that `p` has been declared as follows:
 ```c
 char *p = "abc";
 ```
@@ -16,6 +17,15 @@ char *p = "abc";
 // A - Not legal, because putchar accepts a `char`, not a pointer.
 putchar(p);
 // B - Legal, output: `a`
+putchar(*p);
+// C - Legal, output: `abc`
+puts(p)
+// D - Illegal, `puts` accepts a pointer to a null terminated string, not a `char`.
+```
+<hr>
 
-
-```
\ No newline at end of file
+> **3.** Suppose that we call `scanf` as follows:
+```c
+scanf("%d%s%d", &i, s, &j);
+```
+> If the user enters `12abc34` `56def78`, what will be the values of `i`, `s`, and `j` after the call? (Assume that `i` and `j` are `int` variables and `s` is an array of characters.)