Table:
text: Northland Conference (IHSAA)
Membership
Membership
School Location_ Mascot County Year_Joined Previous_Conference Year_Left Conference_Joined
Argos Argos, IN Dragons 50 Marshall 1998 independent 2008 independent
Elkhart Christian Elkhart, IN Eagles 20 Elkhart 2004 new IHSAA school 2008 independent
Marquette Catholic Michigan City Blazers 46 LaPorte 1998 independent 2007 Greater South Shore
Oregon-Davis Hamlet, IN Bobcats 75 Starke 1998 independent 2008 independent
River Forest Lake Station Ingots 45 Lake 1998 Northwest Hoosier Conference 2007 Greater South Shore
South Central (Union Mills) Union Mills Satellites 46 La Porte 1998 independent 2003 Porter County
Westville Westville, IN Blackhawks 46 La Porte 1998 Porter County 2008 independent

Question: What is the average year that the Northland Conference (IHSAA) joined for all schools that left before 2003?

Question: What year did the Ingots leaving after 2007 join the Northland Conference (IHSAA)?