Bob is expected to be available in the office at specified times. Bob is classified as:

The correct classification for Bob, who is expected to be in the office at specified times, is an employee. An employee is generally defined by the level of control the employer has over their work, which includes providing direction and setting hours. In this case, since Bob is expected to be available at specific times in the office, it indicates a significant degree of control by the employer, which is a key characteristic of an employment relationship.

The other classifications do not fit this scenario as neatly. An independent contractor typically works on a freelance basis without such specific hours or location requirements and retains control over how they perform their tasks. Statutory employees and statutory nonemployees have unique situations defined by the IRS that are typically related to specific tax treatment but do not align with standard employee status, especially regarding the requirement to report to a workplace at set times. Given Bob's situation, he clearly meets the definition and obligations of an employee.