Yes.
Read moreThe writing is shirk but if the imam doesn’t say or believe in this, this is permissible.
Read moreNo, this is prohibited.
Read moreHe must make his wudu first. How to join the imam on the prayer when I am late – Shaykh Assim Al Hakeem https://www.youtube.com/watch?v=H86iB5ldtNE
Read moreIt is permissible to offer salutation upon the Prophet salla Allahu alaihi sa sallam while in sujood as it is Duaa and Duaa in sujood is recommended.
Read moreYes he must pray it at this time.
Read moreThe sunnah prayed before and after should be 2×2 and not one continuous prayer.
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