Problem $2($Worth $22$ percent$)$

Excel shows a linear regression of $8,775+750t($use this as the regression for the following problem do not calculate your own$)($show all of your work for credit$)$

An electronics manufacturer has seen demand for its latest $3$D holographic television increase over the past three months. The observed demand has been D$1=9,213,$ D$29,754,D3=10,784$ and D$4=11,632$ Forecast demand for period $5$ using trend$-$corrected exponential smoothing with alpha $=0\mathrm{.}15,$ and Beta $=0\mathrm{.}25?$

Find L$1,$ T$1,$ L$2,$ T$2,$ L$3,$ T$3,$ L$4,$ T$4$ and F$5$