' Gongle Docs Fall 2022 Home Announcements Assignments Grades People .| Courses Fl es && Quizzes Modules Chat Calendar [9 Media Gallery My Media Inbox 6) History - 111 Academic Policies '5 Mental Health Resources Help l6 I) B bcourses.berkeley.edu Cl e Week1: infectious Disease Dynamics (Fal... X 6 Quiz: Septem er 14 Quiz ~'l 9.... One day, while going for a walk, you see a ock of birds in the sky. The path (trajectory) of four of these birds are shown below. If the speed of each bird is constant, for which of the four is the net force on the bird zero? lb) ' Allofthemt ' (a), (b), and (C) ' (CD only Not enough information given to tell None of them