Multiple choose

Suppose client PC named X initiates a telnet session to a server called S. At the same time a laptop client named Y initiates a telnet session to server S also. Provide possible source and destination port numbers for:

A- The segments sent from X to S

B- The segments sent from Y to S

C- The segments sent from S to X

D- The segments sent from S to Y

E- If X and Y are different hosts is it possible for them to both use the same source port number?

F- If X and Y are the same host, is it possible for them to both user the same source port number?