Misc: who is identified with the word 'eureka'?

Questions

The collection of poems called Barrack Room Ballads and Other Verses was written by whom in 1892?

In which decade was Mohandas Karamchand Gandhi born?

A stupa is a shrine to the memory of whom?

In what year was the Model T Ford car first produced?

Which planet with at least eighteen known moons is sixth closest to the Sun?