1. For each of the following blocks show the network address for the subnet, the first legal address in the block, and the last legal address in the block.

a. 123.56.77.32/29

b. 200.17.21.128/27

c. 17.34.16.0/23

d. 17.34.16.0/22

2. In a block of addresses you know the host address of one host is 65.32.125.137/24. What is the first and last legal address in this block? How would this change if the mask were 23? How would it change if the mask were 25?