1. Currently, negotiations on complicated border disputes are going on between Chernarus and Carpathia. Suppose that a summit between the foreign ministers of the two countries will resolve all the border issues with probability 1/4. Furthermore, suppose that, for i ≥ 2, if the previous i − 1 summits are unsuccessful, the ith summit will be successful with probability 1 −

1 i

. What is the probability that no more than 4 summits are necessary to successfully resolve the border disputes between Chernarus and Carpathia?