(a) 5 points. Briefly explain the count-to-infinity problem and why it can occur in distance vector routing. (b) 5 points. Does the count-to-infinity problem occur when link costs decrease? Why or why not? (c) 5 points. Does the count-to-infinity problem occur when two nodes are connected that did not previously have a link? (d) 5 points. How does poisoned reverse address the count-to-infinity problem? (e) 5 points. Describe a scenario where poisoned reverse does not address the count-to- infinity problem.