A private network uses a NAPT device at public IP address 143.231.15.10 The computers in the network use addresses of the form 192.168.1.x/24. Suppose that computer inside the NATed network sends a request with 

Source address:                                       192.168.1.6
Source port:                                             433

Destination address:                              111.33.45.50
Destination port:                                     21 

The next available port number on the NAPT device is 13450

1. What source and destination information do the request packet headers contain when the request is sent out by the sending host?
2. What source and destination information do the request packet headers contain when the request is sent out by the NAT box?
3. What source and destination information do the response packet headers contain when the response is received by the NAT box?
4. What source and destination information do the response packet headers contain when the response is received by the original sending host?