$31.$ Use a four$-$period moving average to determine the forecasted demand for July, August, and September. Select correct answer and show all your calculations with details.

Question $31$ options:

A$)$

July forecast $=32\mathrm{.}5$; August forecast $=33\mathrm{.}5$; September forecast $=37\mathrm{.}5$

B$)$

July forecast $=31\mathrm{.}33$; August forecast $=34\mathrm{.}5$; September forecast $=37\mathrm{.}5$

C$)$

July forecast $=30$; August forecast $=33\mathrm{.}5$; September forecast $=40\mathrm{.}5$

D$)$

July forecast $=30$; August forecast $=32\mathrm{.}5$; September forecast $=37\mathrm{.}5$