$3$A$.)(6$ pts$)$ The height of a triangle is increasing at a rate of $3$ inches per minute while the base of the triangle is decreasing at a rate of $2$ inches per minute. At the instant when the height is $8$ inches and the base is $4$ inches, what is the rate of change of the area of the triangle? NOTE: $\backslash ($ A$=\backslash$frac$\{1\}\{2\}$ b h $\backslash )$