2. Consider a solution that uses a dipph-first strutegy for a problom with a branching factor of 2. Assume that the branchex, B/ and B2, have an associated cost of development CI and C2, respectively. Supposie that it is known that the probability that the problean will be solved tirough BI is p, and the probability that the problem will be solved through AZ is (I,). Give a criterion to be used in deciding on the order of trying the branches