Probability and Statistics: need assistance or guidance on how to work through these problems. On any given day Buffy is either cheerful (c), soso...

Assistance with Bernoulli and Poisson Processes. Also understanding Markov Chains (Discrete and continuous time) would be helpful. working through a few homework. please see the 3 questions I am struggling with. A detail explanation or guidance to where to start/approach these problems would be appreciated.