Come join, I'm being dumb

The average cost of one year at a private college in 2012-2013 is $43,289. the average grant aid received by a student at a private college in 2012-2013 is $15,680.   what is the average student contribution for one year at a private college in 2012-2013?

Which component acts as a platform on which application software runs

On nba 2k 19, every time i try to join a my park game, it leads ro a website telling my dad that he needs ps plus. i already have ps plus though. how do i fix this?