What were the claims of Hazrat Mirza Ghulam Ahmad of Qadian, The Promised Messiah^(as)?

Why was it important to write about these claims and promote them in his writings?

What other services did he do for Islam?

There are Ahadith that the lineage of Imam Mahdi will be from the family of the Holy Prophet^(sa)?

The Promised Messiah^(as) claimed to Adam and Jesus among other prophets, can you elaborate on that?

There are so many proofs for the truthfulness of The Promised Messiah^(as) why then people do not believe in them?

In which way The Promised Messiah^(as) broke the Cross?

Did Promised Messiah^(as) claim Hakm and Adl, Mahdi and Promised Messiah^(as) at the same time?