$($iii$)$ Exponential$$ smoothing, with alphaequals$0\mathrm{.}26.$

The CFE is

$$

negative $67\mathrm{.}68.($Enter your response rounded to two decimal$$ places.$)$

Part $11$

The MAD is

$$

$6\mathrm{.}66.($Enter your response rounded to two decimal$$ places.$)$

Part $12$

The MSE is

$$

$62\mathrm{.}95.($Enter your response rounded to two decimal$$ places.$)$

Part $13$

The MAPE is

$$

$5\mathrm{.}49\%.($Enter your response rounded to two decimal$$ places.$)$

Part $14$

$($iv$)$ Trend projection with Regression.

The CFE is

$$

enter your response here. $($Enter your response rounded to two decimal$$ places.$)$