History of question #21223
| When | Who | Action | New State |
|---|---|---|---|
| Andrea Corbellini | Answer | Answered | |
| u-235 | Reopen | Open | |
| arochester | Answer | Answered | |
| Christoph Langner | Answer | Answered | |
| Manish Sinha (मनीष सिन्हा) | Answer | Answered | |
| Jim Hutchinson | Answer | Answered | |
| u-235 | Confirm | Solved |
