UnScramble this Word: u t n s s e c r?

Questions

These two excellent PopRBers are roomates at Yale (use "and")?

This player helped Sergei get the outrageous score of 75100?

Three of the top PopRB players go to Yale, in alphabetical order they are?

What player's Fab 50 Hard cat does everyone seem to despise?

A Cadence on a V chord is known most commonly in the US as what?