ACKNOWLEDGMENT AND AGREEMENT TO TENDER UNITS OF LIMITED PARTNERSHIP UNITS OF NATIONAL PROPERTY INVESTORS 7 (THE "PARTNERSHIP") PURSUANT TO AN OFFER TO PURCHASE DATED MAY 8, 2002 (THE "OFFER DATE"), AS SUPPLEMENTED JUNE 3, 2002 BY AIMCO PROPERTIES, L.P.Acknowledgment and Agreement to Tender Units of Limited Partnership Units • June 4th, 2002 • National Property Investors 7 • Real estate
