Expression 2: "y" equals "y" Subscript, 1 , Baseline left bracket, max left parenthesis, left bracket, 1...count left parenthesis, "y" Subscript, 1 , Baseline , right parenthesis , right bracket left bracket, "x" Subscript, 1 , Baseline less than or equal to "x" , right bracket , right parenthesis , right brackety=y1max1...county1x1≤x