What would be th subnet mask if we added 12 subnet bits to a default Class A subnet mask? 1. 2. Given'a sbnet mask of 25S:255:255:0 with a Class-B-address,how many subnets would. be available? Given a subnet address of 140.125.8.0 with a subnet mask of 255.255.252.0 wht is the address of the next higher subnet? 3. 4If we saw the following subnet addresses, what would be the mask associated with these subnets? 140:120.4.0 140.120.8.0 140.120.12.0 140.120:16.0 5. What is the subnet mask for an address expressed as 17.25.0/0 /24