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a$.$ Forecast September sales volume using each of the following:

$(1)$ The naive approach.

$\backslash$table$[[$Naive approach,ousands$]]$

$(2)$ A five$-$month moving average. $($Round your answer to $2$ decimal places.$)$

Moving average thousands

$(3)$ A weighted average using $0\mathrm{.}65$ for August, $0\mathrm{.}20$ for July, and $0\mathrm{.}15$ for June. $($Round your answer to $2$ decimal places.$)$