diff --git a/education/software development/ECE1400/Chapter 8 Exercises.md b/education/software development/ECE1400/Chapter 8 Exercises.md
index c72d8e0..d5b88eb 100644
--- a/education/software development/ECE1400/Chapter 8 Exercises.md	
+++ b/education/software development/ECE1400/Chapter 8 Exercises.md	
@@ -1,8 +1,11 @@
 > 1. We discussed using the expression `sizeof(a) / sizeof(a[0]` to calculate the number of elements in an array. The expression `sizeof(a) / sizeof(t)` where `t` is the type of `a`'s elements would also work, but it's considered an inferior technique. Why?
 
+Answer: 
+Using the type of the array's first element means that if you change the type of an array, it won't break the code that calculates the number of elements. 
+
 > 3. Write a declaration of an array named weekend containing seven `bool` values. Include an initialize that makes the first and last values `true`; all other values should be `false`.
 
-> 6. Calculators, watches, and other electronic devices often rely on 7 segment displays for numerical output. To form a digit, such devices turn on some of the seven segments while leaving others off.
+> 4. Calculators, watches, and other electronic devices often rely on 7 segment displays for numerical output. To form a digit, such devices turn on some of the seven segments while leaving others off.
 > 
 >    Here's what the array might look like, with each row representing one digit:
 ```