Tang went into a bicycle shop to purchase a bike rack. He asked the salesperson for help in picking out a rack that would fit his bike. While the salesperson was helping another customer, Tang went ahead and chose one he wanted. The salesperson then told Tang that the rack was a good one. After Tang put the rack on his bike, it did not fit properly and damaged his gear shift. Explain whether Tang can rightfully claim that the salesperson committed a breach of warranty of fitness for a particular purpose.