4. Evaluate the following limits, if they exist. Show all work. [12 marks] -x2+2, if x50 lim f (x) , for f (x) = a ) * -0 - 1, if x >0 limf (x) b) x- 1 for the graph of f(x) shown at the right. lim (x' - 3x- + x-20) c) x--2 Vx+25 -5 lim d) x-0 X lim x- - 4x - 5 x4-1 x2 - 2x -3 rev 0919 4