A coalition of miners controlling a fraction $\backslash$alpha of the total mining power attempts to censor transactions by announcing: $$if we see a block containing a transaction from our blacklist, we will attempt to fork until we are $3$ blocks behind the main chain.$$ This strategy can be shown as the Markov chain:

a$.$ What is the probability that the censorship attack will succeed in terms of $\backslash$alpha $?$