I appreciate any help with the following five questions (need within next hour).

(1) Show the subnet address, subnet mask in slash notation, broadcast address, number of addresses, first valid host address, and the last valid host address for the subnet address of the host with IP v4 address: 102.183.7.15  255.240.0.0

(2) An IPv4 header bytes in Hex notation is given as:  45 00 05 dc  fd 2b 20 00  80 11 95 ca  c0 a8 00 64  c0 a8 00 66.  Answer the following questions about the header: Are options being used? What type of higher-level protocol is this datagram carrying? Is there a fragmentation? If yes, is this a first, last, or middle fragment? What are source and destination IP addresses for the IPv4 header?

(3)  A host with an IP address 125.11.78.10 and a MAC address AA:BB:A2:4F:67:CD has received an ARP request from a router with IPv4 address 125.45.23.12 and the MAC address 23:45:AB:4F:67:CD. Show the ARP reply packet entries the host sends to

(4) A TCP client sends 64 bytes of data to a TCP server.  Calculate the efficiency of this transmission at the TCP level (ratio of data excluding header to the total bytes transmitted). Calculate the efficiency of transmission at the IP level.  Assume no options for the header and no errors.  Calculate the efficiency of transmission at the data link layer.  Assume no options for IP header and Ethernet-II format are used at the data link layer router.    

 (5) Using 7-bit sequence numbers, what are the maximum sizes of the send and receive windows for each of the following protocols:  Stop-and Wait ARQ, Go-back-N ARQ, and  Selective-Repeat ARQ?