An Agile team is in Sprint 5. Team selected 4 user stories for the sprint backlog. User story 1 constitute of 2 points, user story 2 constitute of 4 points, user story 3 constitute of 3 points and user story 4 constitute of 4 points. Team divided user story 4 into 2 equal tasks. By the end of Sprint 5, team completed user stories 1, 2, 3 and one task of user story 4. How many story points will contribute towards velocity in Sprint 5?
a. 13
b. 11
c. 10
d. 9