1 files changed, 1 insertions, 1 deletions
diff --git a/README.md b/README.md
index d11318d..fee3989 100644
--- a/README.md
+++ b/README.md
@@ -75,7 +75,7 @@ more visible in the list the first exercise of a group is in bold italics.
 | **_4_b_1_**    | yes, in 4_b_2 | 97   | |
 | 4_b_2          | yes    | 98   | |
 | 4_b_3          | yes    |      | |
-| 4_b_4          |        |      | |
+| 4_b_4          | yes    |      | |
 | 4_b_5          |        |      | |
 | 4_b_6          |        |      | |
 | 4_b_7          |        |      | |