Shaankara Advaita Vedaanta - Part 2

As per the traditional Advaita guru parampara, who is the 5th guru?

Among the disciples of who wrote the work Naishkarmya Siddhi?

As per the tradition, who is known as Teekakara?

Who wrote the huge commentary on Shankaracharya's Brahma Sutra Bhashya named Bhamathi?

What is the magnificent introduction written by Shri Shankaracharya in his commentary to Brahma Sutra known as?