3. Evaluate the following limits. Show all work. If limit does not exist, explain why. (9 marks: 2,3,2,2) a) lim Vx + 5 x--5 b) 3-V9+5x lim X c) Vx+v3x-2 lim ~ x-1 1+x d) x3-x5 lim * x--1 x+1 4. Determine the value(s) of k for which the function f (x) = * + 4x + 3, x# -2 continuous for all real values of x. 3kx, x = -2 is