Linux and operating systems questions

Your Linux system's umask variable is currently set to a value of 077, and your permission is 0777 when you create the files. What can your project teammates do with your files? g) A. They can view the file, but they can't modify or save it. B. They can open, modify, and save the file C. They can open, modify, and save the file. They can also execute the file if it is an executable. D. They have no access to the file at all A. cd B. cd D.cd.. h) What command is used to change to parent directories? i) What command will force a process to quit even one running in the background? B. kill 13 C. kill 15