Ralph has been hired by a company to redesign its Local Area Network $($LAN$).$ Right now, it has a single $100$ Mbps Ethernet LAN with $40$ users and $2$ shared servers, all connected through $3$ hubs. The users on the network must be able to share files with one another and also access the shared servers. The users are complaining that the network is too slow. Management states that cost is a factor that must be considered. Which of the following upgrade scenarios should Ralph recommend in this situation?Split the network into smaller segments with dedicated hubs as opposed to shared hubs.Split the network into two routed LANs with $20$ users each.Replace the hubs with switches to define separate collision domains and filter unnecessary traffic from eachsegmentReplace the hubs with a layer $3$ switch and define two Virtual LANs $($VLANs$)$ with $20$ users each.