music: 70's Chart Toppers: Name The Artist: Everybody Dance?

Questions

A summary of the plot of a play,film etc with details of characters scenes etc?

Land locked country in NW Asia,capital Yerevan?

Though it shares the name of a highly poisonous plant, tea made from the needles of the_______tree is perfectly safe for consumption?

What does the E. in E.coli stand for?

the whistling teakettle, invented in 1921 in what country?