Please answer question, especially explain hypothesis and decision in (c)

1. Follow up the discussion of our sleep equation used by Biddle and Hamermesh (1990) to study the tradeoff between time spent sleeping and working affecting sleep: Simplified Version: sleep =0+1 totwrk +vEq(1) where sleep and totwrk (total work) are measured in minutes per week. The simplified version can be extended to be a multiple regression model as: Multiple version: sleep =0+1 totwrk +2 male +4 yngkid +uEq(2) Where yngkid =1 if childern