Question 3: All franchises wanted the use of the POS (in-line point-of-sale) system by the Bistro sandwich shops. A non-related business, RBS, was the only permitted device. Bistro's parent, doctor's associates, issued by suppliers of an incumbent POS system, claiming an illegal tying arrangement, among many other things. a) Explain the alleged tie? b) Doctor's Associates should be defended (Bistro)? c) Explain what the defendant will have to show in order to prevail