Year

$1$

$2$

$3$

$4$

$5$

Forecast$($ES$)$

$5\mathrm{.}0$

$$

$5\mathrm{.}4$

$$

$6\mathrm{.}84$

$$

$5\mathrm{.}7$

$$

$7$

Part $3$

Provide the forecast from periods $2$ through $5$ using the naive approach $($enter your responses as whole$$ numbers$).$