Refactor E and S

WEEK02/WEEK02-04.md

@@ -1,10 +1,10 @@
-# Embedded Systems Reverse Engineering
+# Embedded Systems Reverse Engineering
 [Repository](https://github.com/mytechnotalent/Embedded-Hacking)
 
 ## Week 2
 Hello, World - Debugging and Hacking Basics: Debugging and Hacking a Basic Program for the Pico 2
 
-### Exercise 4: Automate the Hack
+### Non-Credit Practice Exercise 4: Automate the Hack
 
 #### Objective
 Create a reusable GDB command that injects a string into SRAM, repoints `r0`, and resumes execution with a single call.
@@ -56,7 +56,7 @@ You will define a custom GDB command `hack` that writes a payload to `0x20000000
 
 ###### Question 1: How could you parameterize the command to accept different strings or addresses?
 
-###### Question 2: What happens if you define `hack` before setting the breakpoint—will it still work as expected?
+###### Question 2: What happens if you define `hack` before setting the breakpoint—will it still work as expected?
 
 ###### Question 3: How would you adapt this pattern for multi-step routines (e.g., patch, dump, continue)?