Immigration of Ole Gunderson's family

A number of the children of Ole Gunderson Brettingen and Dorte Audensdatter Brænd departed from Sollia, Hedmark, Norway. Marit and Gulbrand left Sollia on 9 May 1869 Ouden, Helene, and Mathea left Sollia on 20 June 1881 Ole and Karen left Sollia on 27 Feb 1882 I would like to know when and where they arrived and especially the city they were headed for. Could someone help me know how I could find this information? Where would I look? Thank you so much. PJHinckley