A. The final estimate of the user story in story points is determined by applying the three-point estimation technique with the following input values: most optimistic estimate = 1, most likely estimate = 3, and most pessimistic estimate = 21

B. Further estimation rounds should be performed until all team members will pick the card having the same value: this value will represent the final estimate of the user story in story points

C. The final estimate of the user story in story points is determined by calculating the average value between the most optimistic estimate of 21 story points (Memb4) and the most pessimistic estimate of 1 story point (Memb6)

D. Memb6 and Memb4 which have produced the most pessimistic and the most optimistic estimates respectively, should explain the reasons of their choices to stimulate a discussion between all members before to proceed to another estimation round