diff --git a/examples/bare3.rs b/examples/bare3.rs
index caeba37333a6254764ad738dc9a54a76e04c2aa6..31e24758a8510c1f414b258fb52c9ecda11f4eec 100644
--- a/examples/bare3.rs
+++ b/examples/bare3.rs
@@ -40,7 +40,7 @@ fn main() -> ! {
     hprintln!("").unwrap();
 
     let a: [u8; 4] = [65u8; 4];
-    //let mut a = [0u8; 4];
+    let mut a = [0u8; 4];
 
     hprintln!("").unwrap();
     hprintln!("a = {}", core::str::from_utf8(&a).unwrap()).unwrap();
@@ -98,7 +98,9 @@ fn main() -> ! {
 //`
 //    Run the program, what happens and why?
 //
-//    ** your answer here **
+//    ** Rust allows this shadowing and therefore builds without error.
+//    When the program runs, the last hprintln! prints "a =" without any characters.
+//    This is because a = [0, 0, 0, 0] and 0 in utf8 is the NULL character. **
 //
 //    Commit your answers (bare3_3)
 //