Question 10 Let (Xn)n6N0 be a branching process dened as in (8.1.1) in the script on page 310 with X0 = 1. Assume that the corresponding (Yn)nN satisfy PO"n = 0) 2 co, MY\" 2 1) = cl, for strictly positive constants (30,01 > 0 satisfying Cu + C1 = 1. Then the extinction probability of the branching process is equal to 1. YES N0 \