$($a $)$ Write a program to create a thread and perform the

following $($Easy$)$

$$ Create a thread runner function

$$ Set the thread attributes

$$ Join the parent and thread

$$ Wait for the thread to complete

$($b$)$ Write a program to create a thread to find the factorial of a

natural number $$n$.($Medium$)$

$($c$)$ Assume that two processes named client and server running

in the system. It is required that these two processes should

communicate with each other using the shared memory concept.

The server writes alphabets from a $...$ z to the shared memory. The

client should read the alphabet from the shared memory and

convert it to A$...$Z$.$ Write a program to demonstrate the above$-$

mentioned scenario. $($Medium$)$