Priya, as the owner of the bakery, has the ultimate authority over all aspects of the bakery's operations, including the style of cake decoration. Meena, being a specialist in cake decoration, would likely be responsible for the execution of the cake designs and might have some discretion over the decoration style as it pertains to her specialty. However, any significant changes to the decoration style would require approval from Priya, the owner.

Arjun, who was hired to handle customer service, would not normally have the authority to make decisions about Meena's employment. Employment decisions are typically made by the owner of a small business or those in managerial or supervisory roles. Since there is no indication that Arjun holds such a position, and his role is separate from that of cake decoration, he would not have the power to decide on hiring or firing his sister Meena or to make decisions that would significantly alter her role as the cake decorator. Meena's employment and professional activities about cake decoration would be overseen by Priya, the owner of the bakery.
Priya is the owner of a small bakery. She has recently hired Arjun to handle customer service. Meena is Arjun's sister and also works at the bakery, specializing in cake decoration. Who has the authority to change the decoration style of the cakes, and can Arjun make decisions about Meena's employment at the bakery? Provide a brief response.