Now, looks pretty horrendous  alright, but if we  bum data on S T, S T minus one, S T minus two and P T minus one, all actual  variables, if we bung those into the  microfit and ask them to  form the regression, it would do, right, it would just  you'd get S T equals A plus B  that's T minus one  plus C  A T minus two  plus D  A T minus one  alright, and   B T   So before we  we'll call that equation four  right, so although it looks nasty  alright  it's fairly straightforward, it's all, all we're doing is, we'd be asking the computer to regress S T on constant  like how you would yourself  T minus one  to like values  T minus two  and like prices  okay.