Which of the following are passive activities? a. marvin is a limited partner in the jayhawk beach club and owns a 20 percent interest in the partnership. b. marcie owns a royalty interest in an oil and gas operation. c. neil owns an 18-hole semiprivate golf course. he is a certified professional golfer and serves as the club pro. he provides lessons and is involved in the daily management of the business. d. assume the same facts as in part c, except that neil plays on the professional tour. when on break from the tour, he mingles with the members and con-ducts golf clinics. the club is managed by his brother and sister. e. laura owns a commercial office building. she spends more than 500 hours a year managing the building. she also spends 1,700 hours working in her own real estate development firm. f. assume the same facts as in part e, except that laura hires a full-time manager for the commercial office building. she spends 75 hours meeting with the manager and reviewing the operatio