The forestfires.csv data base contains meteorological information and the area burned for $517$ forest fires that occurred in Montesinho Natural Park in Portugal. The columns of interest are FFMC$,$ DMC$,$ DC$,$ and ISI, as well as the response variable, area.

Read in the file forestfires.csv$.$

Use the ols$()$ function to perform forward selection stepwise regression on the variables FFMC$,$ DMC$,$ DC$,$ and ISI, in that order.

Continue the stepwise regression until no new variables have a p$-$value less than $0\mathrm{.}15.$

Ex: If the variable RH is used instead of FFMC$,$ the output is: