Ons/19593202 Serena Haley Bracelets 8 9 Necklaces 16 12 Table 2-6 shows the output per week of two jewelers, Serena and Haley. They can either devote their time to making bracelets or making necklaces. Refer to Table 2-6. What is Serena's opportunity cost of making a necklace? 1/2 of a bracelet 1/2 of a necklace 3/4 of a bracelet O 2 necklaces