2.3 Continuing from the last question, derive the conditional probability of the outcome at time f being o, that is, P(Xt = 0 | X1:-1 = X1:-1, XI+1:T = X+1:T). You can express you answer using the quantity P(Z, = s | X1:1-1 = X1:-1, XII:T = X+1:T) from the last question. Similarly, express your final answer without using the proportional sign. (5 points)