Given the data shown below, use $=0\mathrm{.}2$ and $=0\mathrm{.}4$ to create a trend enhanced smoothing based forecast for period $7.$ Assume that $FI{T}_1=20$ and $T_1=7\mathrm{.}6.$

Note: Round your intermediate calculations and final answer to $1$ decimal place.

Period:

$\backslash$table$[[1,2,3,4,5,6],[20,28,40,49,54,66]]$

Click here for the Excel Data File

Forecast for period $7$