Consider the forecast above, what is the value of the smoothing constant $($weight$)$ used in the SES forecast?

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Select one:

a$.2\mathrm{.}35172$

b$.4$

c$.0\mathrm{.}119$

d$.3\mathrm{.}66406$

e$.$ Cannot be determined from the table

please explain in detail how to solve thos problemno