The goal for the code following the fork$()$ statement is as follows:

The program must display the message "Could not create process!" if process creation is

The parent process must wait for the child process to be done and then return

The child process must switch to a different program based on what is passed in the arg

To achieve this goal, appropriate code must be put into the regions marked as "Block $1",$ "Blo the block with the code that should go into the block.