Please help me build this tree! tell me what would go into the cells.

1. Build the Binomial model calculator in Excel see the Excel template for a suggest how to structure it. Build so you it can be used to value options using at minimum 4 steps. Inputs Computed 810 Spot price =S Strike=K Risk free rate=r d= volatility a= 0.5 time=T time step= steps Su^2= f_uur TREE Sur f_ur Suda Option=f f_ud Sd= f_d= Sd^2= f_dd= 1. Build the Binomial model calculator in Excel see the Excel template for a suggest how to structure it. Build so you it can be used to value options using at minimum 4 steps. Inputs Computed 810 Spot price =S Strike=K Risk free rate=r d= volatility a= 0.5 time=T time step= steps Su^2= f_uur TREE Sur f_ur Suda Option=f f_ud Sd= f_d= Sd^2= f_dd=