All personal property owned or leased by a nonprofit corporation, which does not accept advertising for a consideration and is engaged exclusively in the production of programs for educational television, and all personal property owned or leased by a nonprofit educational organization, which is engaged exclusively in the production of programs as a noncommercial educational FM or AM broadcast station, shall be exempt from taxation, if such personal property is used solely and exclusively for the purposes of such organization or corporation and no part of the corporation’s or organization’s net earnings inure to the benefit of any private shareholder or

individual.