The smoothing constant, $\backslash$alpha $,$ in the exponential smoothing forecast

Group of answer choices

must always be a value greater than $1\mathrm{.}0.$

must be a value between $0\mathrm{.}0$ and $1\mathrm{.}0.$

should be equal to the time frame for the forecast.

must always be a value less than $0\mathrm{.}10.$