Arrange the following events related to the IIT Delhi student suicide inquiry in chronological order:
- IIT Delhi announced a seven-member external inquiry panel that included former Uttarakhand DGP Ashok Kumar.
- MSc Physics student Rishikesh Kumar died by suicide.
- Students objected to Ashok Kumar's inclusion on the panel, citing his past remarks linking protests to "radicalisation."
- IIT Delhi agreed to reconstitute the panel's composition.