Appointment of new statutory auditor

Dear Sir/ Mam,

In case of Pvt. Ltd. company, the statutory auditor's term has already expired in the AGM of 2022 and we have not appointed the new auditor. We were ready to replace him with another auditor through EGM. But now the earlier auditor is ready to continue the company with 1 year appointment (every year). My query is: 1. can the earlier auditor appointed? 2. Can he be appointed with EGM or how ? 3. Can he be appointed every year as it is his request or is it mandatory to appoint him for 5 years?

Kindly urgently reply.

Thank you in advance.