20. 14 points] A large number of consecutive IP addresses are available starting at 198.16.0.0. Suppose that four organizations, A, B, C, and D, request 4000, 2000, 4000, and 8000 addresses respectively, and in that order. For each of A, B, C and D, fill in the blank with the first IP address assigned, the last IP address assigned, and the format in the w.x.y.z/s notation Example: 172.127.0.0-172.127.15.255 written as 172.127.0.0/20 A: 198.16. B: 198.16., C: 198.16. D: 198.16., 21. [1 point] Which of the following is private IP address? a) 12.0.0.1 b) 168.172.19.39 c) 172.15.14.36 d) 192.168.24.43