What is the forecast for May using a five$-$month moving average?

$\backslash$table$[[$Nov$.,$Dec.,Jan.,Feb.,Mar.,April$],[39,36,40,42,41,46]]$

Weekly sales of ten$-$grain bread at the local organic food market are provided in the table below. Based on these data, forecast week $9$ using a four$-$week moving average.

$\backslash$table$[[$Week$,,$Sales$],[1,,415],[2,,389],[3,,420],[4,,382],[5,410,],[6,432,],[7,425,],[8,,421]]$