The following are historical demand data:

$\backslash$table$[[,,$ACTUAL$],[$YEAR$,$SEASON,DEMAND$],[2011,$Spring,$205],[,$Summer,$142],[,$Fall,$371],[,$Winter,$580],[2012,$Spring,$470],[,$Summer,$281],[,$Fall,$692],[,$Winter,$958]]$

Use regression analysis on deseasonalized demand to forecast demand in summer $2013.($Do nc calculations. Round your answer to the nearest whole number.$)$

Answer is complete but not entirely correct.

$$ Forecast for summer

$2013$