Linux / Unix: please help as much as you can. Thanks.

(1) Give commands for the following

a. Create the directory tree homework/project/.notes from your home directory in one command. Multiple commands must not be used

b. Change the mode of the directory ".notes" as executable only by you.

c. Modify the permissions of a file not readable or writeable or executable by *anyone*.. in one command. Then remove this file. Show commands to do this

(2) Give number equivalents of the following permissions

-r--rwxr-- -rwx-w--w- ----rwx---

(3) Write commands for the following

a. Create a symlink to $HOME/homework in /tmp. Name the link homework_link. b. Create a hardlink to $HOME/homework in /tmp. Name the link as homework_hard c. Set the permissions of a file to readonly for user, group and other without using numbers. d. Redo the command c. with numbers e. Add permissions to the same file so that group and other can write and execute. Do not use numbers.