Q1/ Answer questions a-d for the graph defined by the following sets: N={1,2,3,4}N0={1}Nf={4}E={(1,2),(2,3),(3,2),(2,4)} a) Draw the graph. b) If possible, list test paths that achieve Node Coverage, but not Edge Coverage. If not possible, explain why not. c) If possible, list test paths that achieve Edge Coverage, but not Edge-Pair Coverage. If not possible, explain why not. d) List test paths that achieve Edge-Pair Coverage