If demand of a product for five periods is as follows:

Period $12345$

Demand $($Units$)\mathrm{30}\mathrm{35}\mathrm{40}\mathrm{42}\mathrm{45}$

What is the forecast for the $6$th period using a three$-$period moving average using weights as $\mathrm{0.5},\mathrm{0.3}$ and $\mathrm{0.2}?$