ANSWER: It is not 2 seconds but rather about half a minute to a minute.  This is what the prophet salla Allahu alaihi wa sallam used to do and as Muslims, we follow his sunnah without asking for a justification! 

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ANSWER: You should recite the salutations upon Prophet salla Allahu alaihi wa sallam and can even say the dua until the imam gets up for the third rakah, instead of sitting idle.

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