points$)7.$ Evaluate each of the limits listed below. Justify your answers by identifying the results of Units $2$ and $3$ you apply in each case. If a limit does not exist, explain why.sinxa$.$ limx$0$ Vx$2-$ x$+1$x$3-3$x$2+4$x$-12$b$.$ lim x$>3382-78-6($x $+1)(3-$ x$2).$lim cos$18$dlim$1$xsin $(3$x$)$x $+1$e$.$ lim sin x$1*$Vx $+1$x$\backslash$deg $-1$f$.$g$\mathrm{.}3+$ x$2$limx$0*$x $+1-1$sin $*(3$x$)$limx$01-$ cos$(2$x$)$