Company 'XYZ' has four regional offices D1 to D4 connected as shown in Figure 3. D1 and D4 have both IPv4 and IPv6 available, while D2 and D3 are still on IPv4 network. Create a network solution for the company to meet the following requirements: a) Support all computers in each regional office: D1: 800 computers, D2: 800 computers, D3: 600 computers, D4: 1000 computers; The company has acquired from ISP an allocation of 10.30.128.0/18 and 2001:30:64::/48; c) The link between R101 and R102, the link between R102 to R104, the link between R103 to R104, R101.D1 network and R104.D4 network support both IPv4 and IPv6; d) R102.D2, R103.D3 networks and the link between R102 and R103 support only IPv4. 1) IPv4 network design: Mark networks to be designed on the diagram of Figure 3 below; propose and design a solution that meets the requirements with corresponding network addresses, network masks, and IP ranges. 2950-24 S101 PC-PT T101 1841 R101 1841 R202 1841 R104 2950-24 S102 2950-24 S104 PC-PT T104 Figure 3 Network Topology PC-PT T102 184 R103 2950-24 S107 PC-PT T103