Click here to get an A+ paper at a Discount
For a simple random walk Xn with absorbing boundaries at 0 and 4, and step-up probability p = 2/3, assume that initially it is uniformly distributed on states 1, 2, 3.
(a) Find the probability that X5 = 0.
(b) Find the probability of the process reaching 0 at time 5 but not earlier.
