Questions about Sets (in Euclidean Space)

Draw each of the following sets (1 mark) and decide if it. is open, closed, neither {31' both (1 mark}. i. (2 marks) [1,0] x (14) ii. (2 marks) [Z X Z) |"1([1,0] x (2,4}) iii. (2 marks) _ _ 3((31) ,2}UB((5}.2)U([-1.1] X {-1.11}