The network is using RIPv$2$ as defined in RFC $2453.$ Assume the initial topology is stable; therefore, router R$1\text{'}$s shortest path to network A is via router R$2.$ Router R$1$ receives a full route update from R$2$ at time t $=0$ seconds. At time t $=127$ seconds, the link between router R$2$ and switch S$3$ breaks. Answer the following questions, indicating all times in seconds. You must explain how you arrived at your answers.