Final answer:
Without specific context, it's not possible to accurately determine the portion of duties the Executive Director of MHIC devotes to the office. Normally, an Executive Director would dedicate either all or some portion of their duties to office responsibilities, but it can vary by organization.
Step-by-step explanation:
To determine how much of the Executive Director's duties at MHIC are devoted to the office, more context would be needed. Options such as all, some, none, and half are too vague without specific descriptions of the director's job description or company policy. Normally, an Executive Director would devote a significant portion of their duties to the office because it includes oversight of the company's operations, strategic planning, and leadership responsibilities. However, the specific allocation of duties can vary based on the organization's size, structure, and needs. Ultimately, the most accurate answer would usually be either 'All' or 'Some,' unless the MHIC has an unusual structure where the Executive Director does not focus on office duties at all.