a$.$ Calculate the single exponential smoothing forecast for these data using an $$ of $0\mathrm{.}30$ and an initial forecast $(F_1)$ of $31.$

b$.$ Calculate the exponential smoothing with trend forecast for these data using an $$ of $0\mathrm{.}30,$ a $$ of $0\mathrm{.}30,$ an initial trend forecast $(T_1)$ of $1,$ and an initial exponentially smoothed forecast $(F_1)$ of $30.$

c$.$ Calculate the mean absolute deviation $($MAD$)$ for each forecast. Which is best?