If 'x' stands for '+', '' for 'x', '-' for '=', ' ÷'

If 'x' stands for '+', '<' for '-', '+' for ' ÷', '>' for 'x', '-' for '=', ' ÷' for '>' and '=' for '<', then state which of the following is true ?

1. 3 x 4 > 2 - 9 + 3 < 3
2. 5 x 3 < 7 ÷ 8 + 4 x 1
3. 5 > 2 + 2 = 10 < 4 x 8
4. 3 x 2 < 4 ÷ 16 > 2 + 4

Using the proper symbols in (c), we get
5 x 2 ÷ 2 < 10 - 4 + 8
⇒ 5 x 1 < 18 - 4 ⇒ 5 < 14
which is true.