Analyzing Subnet Masks

For the IP address: 72.1.30.22
And the subnet mask: 255.255.128.0

How many network bits are there?

How many subnet bits are there?

How many host bits are there?

How many subnets can be in the network?
* assume all subnets use the same mask
* assume the zero subnet and broadcast subnet may be used

How many hosts can be in a subnet?

What is the network address for the subnet containing this IP?

What is the broadcast address for the subnet containing this IP?