Given the following demand data, compute a simple exponential smoothing forecast for alpha values of $0\mathrm{.}2$ and $0\mathrm{.}5.$ Use the actual value in Period $1$ as your starting forecast in Period $2.$

Note: Round all answers to two decimal places. Use these rounded answers when computing subsequent answers.

$\backslash$table$[[$Period$,$Actual Demand$],[1,49],[2,50],[3,50],[4,52],[5,53],[6,55],[7,56],[8,54],[9,53],[10,55],[11,55]]$

$\backslash$table$[[$Period$,=0\mathrm{.}2,$a $=0\mathrm{.}5$

how do i do this?