The quarterly sales data $($number of copies sold$)$ for a college textbook over the past two years are given below and apply Winter$$s method for forecasting based on $\backslash$alpha $=\backslash$beta $=\backslash$gamma $=0\mathrm{.}5.$ Year $1$ Quarter Sales $1120210031754132147218632954761.$ What is the level of January $($L$1)($Show your work using an equation$)2.$ What is the predicted demand for quarter $1$ year $1($Show your work using an equation$)3.$ Determine the seasonal index of quarter $1$ year $2($Show your work using an equation$)$