For each of the following functions, decide whether it is even, odd, or neither. Enter E for an EVEN function, O for an ODD function and N for a function which is NEITHER even nor odd.
1.? f(x)=x4+3x10+2x-5
2.? f(x)=x3+x5+x-5
3.? f(x)=x-2
4.? f(x)=-5x4-3x10-2