The model has already been estimated with results shown below. This question is asking you to use the model to forecast the requested time period

$\backslash$table$[[$Month Si$,],[$Jan$,0\mathrm{.}38],[$Feb$,0\mathrm{.}46],[$Mar$,0\mathrm{.}67],[$Apr$,0\mathrm{.}90],[$May$,1\mathrm{.}29],[$Jun$,1\mathrm{.}45],[$Jul$,1\mathrm{.}60],[$Aug$,1\mathrm{.}71],[$Sep$,1\mathrm{.}50],[$Oct$,1\mathrm{.}20],[$Nov$,0\mathrm{.}45],[$Dec$,0\mathrm{.}39]]$

$T=960,675+16115**P-160**P^2+\mathrm{.}64**P^3$

Where,

$P=$ time period

What is the Seasonally adjusted $($SA$,$ trend$)$ forecast for period $149?$

No decimal places or commas

What is the forecast for period $149$ with seasonality?

Hint multiply by the matching Si