What should the ma'mum do if the imam prolongs the tashahhud?

Question:
Some of the common people, when they finish the first tashahhud and the imam is still sitting, repeat it again. So it was said to him: "Make du'a'." He said: "I prefer to repeat it a second and third time?"

Answer:
No, he should send blessings upon the Prophet (peace and blessings be upon him) after the first tashahhud, and if he repeats it, there is no harm.
Q: If the imam is quick in the tashahhud and he did not catch up with him?
The Shaykh: He completes the tashahhud.