Advertising services; business management; business administration services; business services relating to real estate property, namely, business administration services relating to real estate property; business research services; cost price analysis services; economic forecasting services; market analysis and research services; provision of market research information; preparation of business and finance reports relating to commercial real estate for others; real estate marketing services and analysis; providing real estate leads for prospective purchasers; executing marketing campaigns for others in connection with the sale and lease of commercial real estate, and business consulting services in the field of commercial real estate transactions; business consulting, management, and planning services in the field of commercial real estate; negotiation and renegotiation for others of leases and subleases and real estate purchase agreements.