The Trend Line and Seasonal Indexes Shown Below Were Computed $\tilde { y } _ { t }$

Essay

The trend line and seasonal indexes shown below were computed from four weeks of daily observations.Forecast the seven values for the next week.
Trend Line: $\tilde { y } _ { t }$ = 145 + 1.66t (t = 1,2,3,...28)
$$\begin{array} { | l | c | } \hline \text { Day } & \boldsymbol { SI } _ { \mathbf { t } } \\\hline \text { Sunday } & 1.403 \\\text { Munday } & {0 .517 } \\\text { Tuesday } & 0 .515 \\\text { Wednesday } & 0.621 \\\text { Thursday } & 0 .675 \\\text { Friday } & 1.145 \\\text { Saturday } & 2.124 \\\hline\end{array}$$