Expression 5: "y" equals "t" left parenthesis, 0.5 , right parenthesis left brace, 0.5 less than or equal to "x" less than or equal to 1.5 , right bracey=t0.50.5≤x≤1.5
5
Expression 6:
6
Expression 7: "x" equals 1.5 left brace, "t" left parenthesis, 0.5 , right parenthesis less than or equal to "y" less than "t" left parenthesis, 1.5 , right parenthesis , right bracex=1.5t0.5≤y<t1.5