Given the following data, use exponential smoothing $)=(0\mathrm{.}2$ to develop a demand forecast for period $17$ after optimizing a for MAD.

$\backslash$table$[[$Period$,$Demand,Forecast,Alpha$],[1,7,3,\mathrm{.}2],[2,9,,],[3,10,,],[4,8,,],[5,10,,],[6,5,,],[7,6,,],[8,7,,],[9,9,,],[10,6,,],[11,8,,],[12,11,,],[13,8,,],[14,7,,],[15,8,,],[16,7,,],[17,7,,],[18,8,,],[19,9,,],[20,10,,],[,,,]]$

$6\mathrm{.}07$

$7\mathrm{.}84$

$7\mathrm{.}23$