If we win 4 with one of them bring Reading...we'll be on 90. If Reading win all other games they'll be on 91 and WHU will be on 90 if they win all but Reading.
If WHU beat Reading they can get 93 with Reading only able to get 88. So either way, with our goal difference 4 wins, including beating Reading at home should be enough....BUT I'm pretty certain neither Reading or WHU will win every game.