Detailed Instructions: In this task, you will be presented with a question and you have to answer the question based on your knowledge. Your answers should be as short as possible.
See one example below:
Problem: Who were the builders of the mosque in Herat with fire temples ?
Solution: Ghurids
Explanation: This is a good example. Ghurids were the builders of the mosque in Herat with fire temples.

Problem: What are the notes for the matrix , element r of a ring R is one such that r − 1 is a nilpotent element ; in other words , ( r − 1 ) n is zero for some n ?
Solution:
unipotent group