The U$.$S$.$ monthly inflation rate for $2020$ is shown below:

Forecast $($January $2021,a=0\mathrm{.}1)$:

$\%$

Forecast $($January $2021,a=0\mathrm{.}7)$:

$\%$

MAD$(a=0\mathrm{.}1)$: $p.p.$

MAD$(a=0\mathrm{.}7)$: $p.p.$

Which method is better?

The exponential smoothing with a smoothing constant of