4. (10 points) Consider the following Makefile: doit: there cp here down/there cd $ ( cat there) ; is here: pwd > here there: down here sed 's: /[/]$:: ' there down: mkdir down (a) If this Makefile was in an otherwise-empty directory named m1, what commands would be executed, in what order, when the user ran 'make'? (b) Draw the subtree, showing all the files in m1 after 'make' had finished