diff --git a/pdf/Review 6 Quicksort.pdf b/pdf/Review 6 Quicksort.pdf
new file mode 100644
index 0000000..6652017
--- /dev/null
+++ b/pdf/Review 6 Quicksort.pdf	
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:4d089cb0b9116a3a5965b3d9534e77bd8bb77f735297b10c03210d38939b122b
+size 68027
diff --git a/reviews/R5.md b/reviews/R5.md
index 8dde71e..6f72c26 100644
--- a/reviews/R5.md
+++ b/reviews/R5.md
@@ -309,7 +309,7 @@ if __name__ == "__main__":
     print(html_output)
 ```
 
-```
+```txt
 out 25 -> out 20 -> out 17 -> out 13 -> out 8
 ```
 
@@ -467,7 +467,7 @@ Fill in the blanks in the following pseudocode for Heapsort.
 
 ### Solution 2
 
-```{ .line-numbers }
+```txt { .line-numbers }
 HEAPSORT(A)
     BUILD-MAX-HEAP
     for i = A.length downto 2
diff --git a/reviews/R6.md b/reviews/R6.md
new file mode 100644
index 0000000..6a793bf
--- /dev/null
+++ b/reviews/R6.md
@@ -0,0 +1,5 @@
+# Review 6
+
+* Hajin Ju, 2024062806
+
+## Problem 1
\ No newline at end of file