36 REAL ESTATE INVESTMENT SERVICES IN THE NATURE OF PURCHASING AND SELLING OF BUILDINGS, LAND, OFFICE SPACE, REAL ESTATE, AND REAL PROPERTY, LEASING OF BUILDINGS, LAND, OFFICE SPACE, REAL ESTATE, AND REAL PROPERTY, MANAGEMENT OF BUILDINGS, LAND, OFFICE SPACE, REAL ESTATE, AND REAL PROPERTY, AND RENTAL OF BUILDINGS, LAND, OFFICE SPACE, REAL ESTATE, AND REAL PROPERTY