You have a text fi le named important. What commands would you use to display the contents of this fi le in the following four different ways? (a) As is. (b) Reverse the order of the lines. (c)...

You have a text fi le named important. What commands would you use to display the contents of this fi le in the following four different ways? (a) As is. (b) Reverse the order of the lines. (c) Reverse the order of the characters within each line. (d) Reverse both the lines and characters. For (b), (c), and (d), which command performs the opposite transformation? How would you test this?