1) You and your brother can claim the benefits of exemption u/s 54/54EC separately.
2) Yes you can
3) Within 3 years from the date of transfer of the asset. Capital gain A/c should be opened before filing the ITR for the year in which the asset is transferred.
4) Yes at the time of closure of account, approval of jusrisdictional AO is required. He will ask for the proof of investments claimed u/s 54.
5) Capital gain is Rs. 30.67 lacs each.
6) 17/04/2022
7) No
8) Lock in period is 5 years. No loan or advance can be taken against such bonds within 5 years otherwise exemption would be revoked.
For detailed discussion you may opt for phone consultation.