Consider the following statements for a driving point function F(jω):

1. Re F(jω) is an even function of ω and is 0 or positive for all values of ω.
2. Im F(jω) is an even function of ω and is 0 or positive for all values of ω.
3. Re F(jω) is an odd function of ω and is 0 or negative for all values of ω.
4. Re F(s) = 0 for Re s = 0.

Which one of the statements given above is/are correct?