This exercise contains only part $d.$

With $=0\mathrm{.}1$ and the initial forecast for October of $$1\mathrm{.}83,$ using exponential smoothing, the forecast for periods $11$ and $12$ is $($round your responses to two decimal places$)$:

With $=0\mathrm{.}3$ and the initial forecast for October of $$1\mathrm{.}77,$ using exponential smoothing, the forecast for periods $11$ and $12$ is $($round your responses to two decimal places$)$:

With $=0\mathrm{.}5$ and the initial forecast for October of $$1\mathrm{.}72,$ using exponential smoothing, the forecast for periods $11$ and $12$ is $($round your responses to two decimal places$)$:

Based on the months of October, November, and December, the mean absolute deviation using exponential smoothing where $=0\mathrm{.}1$ and the initial forecast for October $=$$$1\mathrm{.}83$ is

$$0\mathrm{.}157($round your response to three decimal places$).$

Based on the months of October, November, and December, the mean absolute deviation using exponential smoothing where $=0\mathrm{.}3$ and the initial forecast for October $=$$$1\mathrm{.}77$ is

$$0\mathrm{.}120($round your response to three decimal places$).$

Based on the months of October, November, and December, the mean absolute deviation using exponential smoothing where $=0\mathrm{.}5$ and the initial forecast for October $=$$$1\mathrm{.}72$ is

$

$($round your response to three decimal places$).$