No choices were supplied; cannot answer the question.
This is a network address
To Know any subnet of this IP you must provide the Subnet mask, otherwise it is impossible to know what is the subnet.
This is not a valid IP address - a valid IP address has 4 bytes. Also, you can't guess the subnet mask from looking only at the IP address; there are usually several options.
That's not a valid subnet mask. Probably the subnet mask is supposed to be 255.255.192.0. You can convert each of the parts separated by dots to binary separately. Just use a scientific calculator, for example, the one that comes with Windows. To be a valid subnet mask, the binary equivalent must have a certain number of only ones, followed by only zeros.
No, 255.247.0.0 is not a valid subnet mask. A valid subnet mask must have contiguous bits set to 1 followed by contiguous bits set to 0, which means that after the 1s, all subsequent bits should be 0. The binary representation of 255.247.0.0 does not adhere to this rule, as it has non-contiguous 1s and 0s.
This isn't a valid CIDR address, so I assume it is: 192.168.1.162/7 That would yield a subnet mask of 255.255.255.254
It does not require a subnet mask.
If this is a default subnet mask, then it would be a class C subnet mask. If you are subnetting a network and this is not the default subnet mask, then it could be either a class A or class B.
The default subnet mask has a standard size. The custom subnet mask allows you to make subnets that are smaller or larger than the default.
255.255.255.0
2 given subnets
255.255.255.0