a$.$

i$.$ Fig. $1$ shows the error term after decomposing a time series into its components.

According to the figure, have the components been calculated correctly? Briefly

explain your answer.

ii$.$ Fig. $2$ shows the ACF plot of a time series. Briefly describe whether there is any

seasonality in the time series

Fig. $1.$ The error term after decomposing a time series into its components.

Fig. $2.$ ACF plot of a time series.