please do all 3 only the answers would be fine too

Recall that we can consider a layered-approach for computer networks where encapsulation is used by each layer. Assume you are a host device sending out a large file of 50Mbytes to another host device. The application layer will divide the file into 25.000 packets. If the transport layer adds a 10 byte header, the network layer adds a 25 byte header, and the link layer adds a 20 byte header, what will be the size of all packets being sent out onto the link? 2,000 bytes 2.055 bytes 2.110 bytes 2,001 bytes Consider the diagram below of two hops, and each link having its own transmission rate. We can assume that nodal processing delays and propagation delays are negligible. What if Rc=1Mbps,Rs=2Mbps, and that all packets are 10R bits long. Using this information, select the corret response regarding queuing delays, with respect to the 2nd packet being sent out. There is not enough information to make a statement regarding the queuing delay of the 2nd packet. The 2 nd packet will not experience any queuing delay. The 2 nd packet will have a queuing delay of:0:010 seconds at the router. The 2 nd packet will have a queing delay of 0.005 seconds at the router. Which of the following is NOT a benefit of the layered approach for computer networks? It divides the network communication process into smaller and simpler components, making it easier for development of new protocols. It allows for interoperability between vendors, so that there can be competition on different implementations of the same application. A protocol can be written for one layer with the assumption that tasks corresponding to other layers will be taken care of. There is interdependence among the layers, as a layer has to wait to recieve data from it's adjacent layer