If the product of five rational numbers is negative, then the number of negative factors in them is?

If the product of five rational numbers is negative, then the number of negative factors in them is?

Singular (1,3,5)

If the product of the multiplication of seven rational numbers is negative, how many possibilities are there for the number of negative factors? If the product of the multiplication of seven rational numbers is negative, how many negative factors are possible?

4 Kinds.
1,3,5 And 7, respectively.