Misc: How many cows does it take to supply the NFL in footballs for one year?

Questions

what is the most given answer on this trivia?

on the tv show 'the simpsons', what is the name of the school janitor?

what english word comes from the old french word covrefeu, meaning cover fire?

what drink was invented by oilmen, who used their tools to stir the drink?

what city did cable cars first roll down clay street in 1873?