please help me with this two questions

i have no idea how to solve them

thanks (in C programming language and Unix)

PostlabO4 9-write a C program "lab04." with the header file "lab04e.h" that takes two strings from present your first and last names. The program prints the values of the command line that re environment variable COURSE using "getenv". Also, the program concatenate the first and last names and print them like "My Name is: xxxx xxxx". Finally, terminate the program with exit status 20" a. Include the source files changed in the report. b. Compile and link the source file to get the executable file "lab04e". Show the commands you have used and their results in your report From the terminal, add a new environment variable "COURSE-CS222", run the executable file and show the output in the report. c. 10- Write a C program "lab04f.c" with the header file "lab04f.h" which asks the user to input four strings for his first and last names, program name and course number. Then, it sets a new environment variable called COURSE with the input value from the user using "setenv" Also, it creates a child process that executes the program (already read from the user) and send the two input name strings as command line arguments and the environment variable. Meanwhile, the parent process should reap the child process and print the child exit status if child had been normally terminated. Make sure you handle all the possible errors properly with clear error messages and proper wrappers. a. Include the source files changed in the report. b. Compile and link the source file to get the executable file "lab04e". Show the commands you have used and their results in your report. Run the executable file where input program does not exist. Show the output in the report. Run the executable file where input program is "lab03. Show the output in the report. c. d