Help please. I'm confused how to answers these

5 2 points If you have just tested the interactions, and the following is currently your best model, what would you do next? E(Y) = Bot B1X1+ 32x12+ $3x5 Nothing; you are finished O Run a partial F test to see if B1 and B3 work O Run a t-test to see if B3 works O Run a t-test to see if B1 works 26 2 points When is it appropriate to engage in extrapolation? O when working with financial data O it is never appropriate O when your data set is very large O with time series forecasting