For each task below, state the single shell command that will take care of the operation. Note that parameters may be needed for some commands. a. From the current directory, move to its parent directory. b. View all files and folders (including detailed information such as file permissions) in the current directory. c. Create a new file called myfile.txt. d. Rename myfile.txt to input.txt. e. Create a new directory called mydirectory in the current directory. f. Create a hard link of input.txt. g. Delete input.txt. h. Show all processes using the BSD long format. i. Create a local environmental variable called my_var with the string value home work 1