Theoretically, exactly how many class A, B, and C IP networks can exist (including the 0.x.x.x and 127.x.x.x networks)? Exactly how many hosts can a network in each class have? Be careful, the first address in the host part of each network is a network ID, not a host address. Neither is the last address in the host part, which is used as a broadcast address. (6 points) 4. Class Number of Networks Number of Hosts per Network_ 5. Decode the IP address 130.169.64.35 /19(10 points) a. Write the subnet mask in dotted decimal notation. b. Given the mask, calculate the number of available subnets and number of available hosts per subnet. c. Calculate the block number, then use it to determine the first six subnet IDs d. List the range of valid host addresses and broadcast addresses on the first six subnets. e. What kind of IP address is 130.169.32.255 /21 (a unicast or broadcast address)? Provide the subnet ID for this address