Write a client program:
a. Sequential client: Each client generates 20 requests; Each request consists of
an integer, i.e., i th request is an integer "i" ranging from 1 to 20; display the
received response on the terminal; close the connection after 20 requests.
b. Concurrent client: For designs 2(b), 2(c), and 2(d), the client program is a
multithreaded program that generates concurrent requests. For example, if we
want 10 concurrent client programs, the client code should run 10 parallel
threads.