4. (30 points) An organization is assigned a Class-C network 200.100.50.0 and wants to form subnets for its three departments: D1 (92 hosts), D2 (62 hosts), and D3 (62 hosts). Describe a possible arrangement of subnets (i.e., give the network address and the subnet mask of each subnet) to make this possible. Note that a department may be assigned multiple subnets; subnets may have different sizes and they shall not overlap