Misc: How many years long is a quinquennium?

Questions

which elementary particle orbits the nucleus of an atom and has a mass 1836 times smaller than that of a proton?

what was tv's top-rated series from 1957 to 1961?

in the movie 'spaceballs', what character did joan rivers play?

on the tv show 'seinfeld', what is kramer's first name?

what's the only us state to grow coffee?