Final answer:
Individual Z will likely be a seller of the stock, while individual X will likely be a buyer.
Step-by-step explanation:
Each individual's discount rate, or required rate of return, is a reflection of their risk perception. The higher the discount rate, the higher the perceived risk. In this case, individual Z has the highest discount rate of 11% while individual X has the lowest discount rate of 5%. A higher discount rate indicates a lower willingness to pay for the stock, while a lower discount rate indicates a higher willingness to pay. Therefore, individual Z will likely be a seller of the stock, while individual X will likely be a buyer.