Final answer:
CEOs' work hours can vary significantly and they often have demanding schedules that include meetings, networking, and managing operations.
Step-by-step explanation:
The study mentioned in the question found that CEOs spend a mere __ hours working alone per week. However, the provided information does not specify the exact number of hours. It is important to note that the workload and working hours of CEOs can vary significantly depending on the industry, company size, and individual work habits. CEOs often have demanding schedules and may spend a significant amount of time in meetings, networking, and managing the overall operations of the company.