a$.$ Using a simple three$-$month moving average, find the forecast for July.

b$.$ Using a three$-$month weighted moving average with weights of $\mathrm{.}60,\mathrm{.}30,$ and $\mathrm{.}10,$ find the forecast for July. $($REMEMBER: In your calculations, apply the highest weight to the most recent week, middle weight to the week before that, and so on$.)$

c$.$ Using exponential smoothing with $\backslash$alpha $=\mathrm{.}5$ and a June FORECAST equal to $15,$ find the forecast for July.

d$.$ Using trend projection $($simple linear regression with a trend line$),$ calculate the regression

equation and the forecast for July