The Sun Prairie boys and Monona Grove girls maintained their leads after Monday’s fourth week of Wisconsin District 4 High School Bowling. The boys competed at Viking Lanes in Stoughton and the girls at Village Lanes in Monona. Eleven boys varsity, four boys junior varsity, four girls varsity and one girls junior varsity teams are competing this year. For varsity only, there were 11 and four last season, and prior to that it was 11 and five, 11 and six, and 12 and six.  The...