If he does the prostration of forgetfulness after the salaam, should he recite the tashahhud and say salaam again?

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Should he take his cue from the person next to him if he is unsure about the number of rak’ahs?
The imaam forgot and stood up for a third rak’ah in Salaat al-Taraaweeh,then he sat down

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Related Answers:
Sujood Ul-Sahw if in doubt while praying
Is there a Tashahhud after Sujood al-Sahw?
Should a latecomer count an extra rak’ah done with the imam?
Should he take his cue from the person next to him if he is unsure about the number of rak’ahs?
The imaam forgot and stood up for a third rak’ah in Salaat al-Taraaweeh,then he sat down

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