I think if we get 81 points we'll likely finish 3rd and be looking over our shoulder at Arsenal. I think it's possible but we have to beat both, which unfortunately would mean dropping silly points elsewhere.
My very simplistic way of looking at it. We have 30 points left to play for. Win all 30 and we're clear champions. 25 - 29 and highly likely champions. 23 -24 we'll need results to go our way. Less than 23 and we'll be watching to make sure we finish top 4.