In each of this situations, what crime has been committed? Explain.
a. Helen is walking to her car one evening when she is approached by person holding a knife who threatens her and takes her watch.
b. Helen leaves her watch on her office desk in her cubicle and someone comes into the cubicle and takes the watch.
c. Helen leaves her watch on her kitchen table, and someone sees it through the window, breaks the window, enters her kitchen, and takes the watch.