Determine the binary values of the variables for which the following standard POS expression is equal to 0.

• (0 + 1 + 0)(1 + 0 + 1)
• (1 + 1 + 1)(0 + 0 + 0)
• (0 + 0 + 0)(1 + 0 + 1)
• (1 + 1 + 0)(1 + 0 + 0)