Question: please anyone can help me with this question The drunk from HW4 is home. There are 4 steps to climb from the street: he takes
please anyone can help me with this question

The drunk from HW4 is home. There are 4 steps to climb from the street: he takes a step every 2 seconds. From the street, step , he takes a step up with probability 1. If he's on steps (D, (2), or CED, he takes a step up with probability 3 and down with probability 1. Once he lands on step @ someone opens the door and he gets in. (a) What' s the probability he'll get in in under 10 seconds? (b) What' s the probability you find him on the street, at one minute
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