question answered

i need short answers for the following questions from Vilayat-i Faqih

[1] Who is the legitimate leader according to Khumayni?

[2] How is this idea new to the history of Shi’ism? 

[3] What does Khumayni’s government want from its populace?

[4] What parallels and differences do we see between Khumayni’s thought and that of other thinkers in our class?