diff --git a/12.md b/12.md
index 17f98893f406927a99a14e101667d60dd24b7d81..d4834ca9bc8616f5aaad58d1ce9e9d2873525181 100644
--- a/12.md
+++ b/12.md
@@ -254,7 +254,7 @@ calculation_steps
 
 
 | Value | Deviation from Average | Squared Deviations from Average |
-| --- | --- |
+| --- | --- | --- |
 | 1 | -2.75 | 7.5625 |
 | 2 | -1.75 | 3.0625 |
 | 2 | -1.75 | 3.0625 |
@@ -310,7 +310,7 @@ nba13
 
 
 | Name | Position | Height | Weight | Age in 2013 |
-| --- | --- |
+| --- | --- | --- | --- | --- |
 | DeQuan Jones | Guard | 80 | 221 | 23 |
 | Darius Miller | Guard | 80 | 235 | 23 |
 | Trevor Ariza | Guard | 80 | 210 | 28 |
@@ -353,7 +353,7 @@ nba13.sort('Height', descending=True).show(3)
 ```
 
 | Name | Position | Height | Weight | Age in 2013 |
-| --- | --- |
+| --- | --- | --- | --- | --- |
 | Hasheem Thabeet | Center | 87 | 263 | 26 |
 | Roy Hibbert | Center | 86 | 278 | 26 |
 | Tyson Chandler | Center | 85 | 235 | 30 |
@@ -384,7 +384,7 @@ nba13.sort('Height').show(3)
 
 
 | Name | Position | Height | Weight | Age in 2013 |
-| --- | --- |
+| --- | --- | --- | --- | --- |
 | Isaiah Thomas | Guard | 69 | 185 | 24 |
 | Nate Robinson | Guard | 69 | 180 | 29 |
 | John Lucas III | Guard | 71 | 157 | 30 |