Can use some help with Computer Networking, with a focus on routing protocols. Part A: Which of these routing protocols is the oldest? (Please select from one of the four options)1. RIP2. BGP3. OSPF4. IGRPPart B: Some routing protocols determine the best route to take based on how many routers a packet must traverse to reach its destination. Which metric measures this? (Please select from one of the four options)1. Hop count2. Latency3. MTU4. Link state