Ahhh im a muffin and its muffin time who wants a muffin please

2.)how does a graphical user interface (gui) on a touchscreen interface differ from a gui on a desktop or laptop? a.)a finger or stylus is used instead of a pointer. b.) a magic wand is used instead of a pointer. c.)users speak commands instead of using a pointer. d.)users visualize commands instead of using a pointer.

Idon understand these and need some ! ?

What are "open-loop" and "closed-loop" systems