$($b$)$ Plot a decision boundary for the first node in layer $1$; that is$,$ w$(1)+2$x$(2)+6=0$ in $($b$)$ below.

$($c$)$ Plot a decision boundary for the second node in layer $1$; that is$,$ wh$(1)+(2)+6=0$ in $($c$)$ below.

$($d$)$ Plot a decision boundary for the output node in layer $2$; that is$,$ w$1191+$ w$1242+$b$^2=0$ in $($d$)$ below